private void Button2_Click(object sender, EventArgs e)
{
sbeta = "";
LoiGiai loigiai = new LoiGiai();
for (int i = 1; i <= 19; i++)
{
lg[i] = new Label();
}
for (int i = 1; i <= 19; i++)
{
lg[i].Font = new Font("VNF-Comic Sans", 12);
lg[i].AutoSize = true;
}
if (a * a + b * b < Math.Round(c * c, 3))
{
lg[1].Text = "Phương trình vô nghiệm vì";
lg[1].Location = new Point(30, 30);
PictureBox ptb = new PictureBox();
ptb.BackgroundImage = Properties.Resources.abc;
ptb.Location = new Point(220, 28);
ptb.Size = new Size(110, 28);
loigiai.Controls.Add(ptb);
}
else
{
if (Math.Round(a, 3) == 1)
{
soa = "";
}
else
{
soa = Math.Round(a, 3).ToString();
}
if (b > 0)
{
if (Math.Round(b, 3) == 1)
{
sob = "+ ";
}
else
{
sob = "+ " + Math.Round(b, 3).ToString();
}
}
if (b < 0)
{
if (Math.Round(b, 3) == -1)
{
sob = "- ";
}
else
{
sob = "- " + Math.Round(-b, 3) + "";
}
}
if (Math.Round(m, 3) == 1)
{
som = "";
}
else
{
som = Math.Round(m, 3).ToString();
}
if (n > 0)
{
son = "+ " + Math.Round(n, 3);
}
if (n < 0)
{
son = "- " + Math.Round(-n, 3);
}
soc = Math.Round(c, 3) + "";
lg[3].Text = soa + "sin(" + som + "x " + son + ") " +
sob + "cos(" + som + "x " + son + ") = " +
soc + " (*)";
lg[3].Location = new Point(20, 20);
lg[1].Text = "Vì";
PictureBox ptb1 = new PictureBox();
ptb1.Image = Properties.Resources.ab;
ptb1.Size = new Size(69, 28);
loigiai.Controls.Add(ptb1);
lg[2].Text = " = " + a * a + " + " + b * b + " = " + Math.Round(a * a + b * b, 5) + " ≠ 0";
lg[1].Location = new Point(30, 50);
ptb1.Location = new Point(50, 50);
lg[2].Location = new Point(115, 50);
loigiai.Controls.Add(ptb1);
lg[4].Text = "(*) <=> " + Math.Round(a / canab, 3) + "sin(" + som + "x " + son + ") + " +
Math.Round(b / canab, 3) + "cos(" + som + "x " + son + ") = " +
Math.Round(c / canab, 3);
lg[4].Location = new Point(30, 80);
double y = beta * 180 / Math.PI;
int y1;
if (int.TryParse(Math.Round(y, 3).ToString(), out y1))
{
if (giai.timthay(y1))
{
sbeta = "" + giai.gdb[y1];
}
else if (giai.timthay(-y1))
{
sbeta = "" + giai.gdb[-y1];
}
else
{
sbeta = Math.Round(beta, 3).ToString();
}
}
else
{
sbeta = Math.Round(beta, 3).ToString();
}
lg[5].Text = "<=> cos(" + sbeta + ")sin(" + som + "x " + son + ") + " +
"sin(" + sbeta + ")cos(" + som + "x " + son +
") = " + Math.Round(c / canab, 3);
lg[6].Text = "<=> sin(" + som + "x " + son + " + " + sbeta + ") = " + Math.Round(c / canab, 3);
//lg[7].Text = "<=> sin(" + som + "x " + son + " + " + sbeta + ") = sin(" + arcsinc() + ")";
lg[5].Location = new Point(55, 110);
lg[6].Location = new Point(55, 140);
//lg[7].Location = new Point(55, 170);
if (Math.Round(c / canab, 5) == 1 || Math.Round(c / canab, 5) == -1 || Math.Round(c, 5) == 0)
{
lg[8].Text = "<=> " + som + "x " + son + " + " + sbeta + " = " + arcsinc1() + " + k2π";
lg[8].Location = new Point(55, 170);
lg[9].Text = "<=> " + ngh1;
lg[9].Location = new Point(55, 200);
}
else
{
lg[8].Text = "<=>";
PictureBox ptb2 = new PictureBox();
ptb2.Image = Properties.Resources.daungoac;
ptb2.Size = new Size(27, 58);
loigiai.Controls.Add(ptb2);
lg[8].Location = new Point(55, 185);
ptb2.Location = new Point(90, 170);
lg[9].Text = som + "x " + son + " + " + sbeta + " = " + arcsinc1() + "+ k2π";
lg[10].Text = som + "x " + son + " + " + sbeta + " = π - " + arcsinc1() + "+ k2π";
lg[9].Location = new Point(120, 170);
lg[10].Location = new Point(120, 200);
lg[11].Text = kq[1];
lg[12].Text = kq[2];
lg[13].Text = "<=>";
PictureBox ptb3 = new PictureBox();
ptb3.Image = Properties.Resources.daungoac;
ptb3.Size = new Size(27, 58);
ptb3.Location = new Point(90, 230);
loigiai.Controls.Add(ptb3);
lg[13].Location = new Point(55, 245);
lg[11].Location = new Point(120, 230);
lg[12].Location = new Point(120, 260);
}
}
Button button3 = new Button();
button3.Text = "Hướng dẫn giải tổng quát";
button3.Font = button1.Font;
button3.Size = new Size(200, 40);
button3.Location = new Point(40, 300);
loigiai.Controls.Add(button3);
button3.Click += Button3_Click;
for (int i = 1; i <= 19; i++)
{
loigiai.Controls.Add(lg[i]);
}
loigiai.Size = new Size(800, 400);
loigiai.ShowDialog();
}
private void Button2_Click(object sender, EventArgs e)
{
this.AcceptButton = button4;
LoiGiai loigiai = new LoiGiai();
for (int i = 1; i < 20; i++)
{
lg[i].Font = new Font("VNF-Comic Sans", 12);
lg[i].AutoSize = true;
}
lg[1].Text = "Đặt t = => = ";
lg[1].Location = new Point(30, 40);
pt[1].Image = Properties.Resources.kchiafx;
pt[1].Size = new Size(118, 64);
pt[1].Location = new Point(90, 20);
pt[2].Image = Properties.Resources.kchiafx2;
pt[2].Size = new Size(130, 64);
pt[2].Location = new Point(235, 16);
pt[3].Image = Properties.Resources.ttru2k;
pt[3].Size = new Size(69, 27);
pt[3].Location = new Point(380, 40);
lg[2].Text = "=> (*) <=> " + soa;
if (k != 0)
{
lg[2].Text = lg[2].Text + "(";
}
lg[2].Location = new Point(30, 85);
pt[4].Image = Properties.Resources.tbinh;
pt[4].Size = new Size(27, 25);
if (k != 0)
{
pt[4].Location = new Point(110 + (soa.Length + 1) * 7, 81);
}
else
{
pt[4].Location = new Point(110 + soa.Length * 7, 81);
}
pt[4].SizeMode = PictureBoxSizeMode.StretchImage;
if (k != 0)
{
lg[3].Text = so2k + ")" + sob + soc + " = 0";
}
else
{
lg[3].Text = sob + soc;
}
lg[3].Location = new Point(pt[4].Location.X + 25, 85);
lg[4].Text = "<=> " + soa;
lg[4].Location = new Point(76, 115);
pt[5].Image = Properties.Resources.tbinh;
pt[5].Size = new Size(27, 25);
pt[5].Location = new Point(110 + soa.Length * 7, 111);
pt[5].SizeMode = PictureBoxSizeMode.StretchImage;
lg[5].Text = sob + soc_2k + " = 0 (1)";
lg[5].Location = new Point(pt[5].Location.X + 25, 115);
lg[6].Text = "Giải (1) ta được";
lg[6].Location = new Point(30, 145);
if (d < 0)
{
lg[7].Text = "(1) vô nghiệm";
lg[7].Location = new Point(30, 175);
}
if (d == 0)
{
if (t1 > 0)
{
if (Math.Round(t1, 3) != 1)
{
sot1 = "+ " + Math.Round(t1, 3) + "f(x) ";
}
else
{
sot1 = "+ f(x) ";
}
}
if (t1 < 0)
{
if (Math.Round(t1, 3) != 1)
{
sot1 = "- " + Math.Round(-t1, 3) + "f(x) ";
}
else
{
sot1 = "- f(x) ";
}
}
lg[7].Text = "t = " + Math.Round(t1, 3);
lg[7].Location = new Point(40, 175);
lg[8].Text = "=> = " + Math.Round(t1, 3) + " => " + sot1 + sok + " = 0";
lg[8].Location = new Point(30, 215);
pt[6].Image = Properties.Resources.kchiafx;
pt[6].Location = new Point(50, 205);
pt[6].Size = new Size(118, 64);
pt[8].Image = Properties.Resources.fxbinh;
pt[8].Location = new Point((("=> = " + Math.Round(t1, 3) + " => " + sot1 + sok + " = 0").Length - 16) * 8 + 10, 199);
pt[8].Size = new Size(47, 37);
if (d1 < 0)
{
lg[8].Text = lg[8].Text + " (vô nghiệm)";
}
if (d1 == 0)
{
lg[8].Text = lg[8].Text + "=> f(x) = " + Math.Round(x1, 3);
}
if (d1 > 0)
{
lg[8].Text = lg[8].Text + " => ";
pt[7].Image = Properties.Resources.daungoac;
pt[7].Location = new Point(50 + lg[7].Text.Length * 5, 200);
pt[7].Size = new Size(27, 58);
lg[9].Text = "f(x) = " + Math.Round(x1, 3);
lg[9].Location = new Point(85 + lg[8].Text.Length * 5, 200);
lg[10].Text = "f(x) = " + Math.Round(x2, 3);
lg[10].Location = new Point(85 + lg[8].Text.Length * 5, 230);
}
}
if (d > 0)
{
if (t1 > 0)
{
if (Math.Round(t1, 3) != 1)
{
sot1 = "- " + Math.Round(t1, 3) + "f(x) ";
}
else
{
sot1 = "- f(x) ";
}
}
if (t1 < 0)
{
if (Math.Round(t1, 3) != -1)
{
sot1 = "+ " + Math.Round(-t1, 3) + "f(x) ";
}
else
{
sot1 = "+ f(x) ";
}
}
if (t2 > 0)
{
if (Math.Round(t2, 3) != 1)
{
sot2 = "- " + Math.Round(t2, 3) + "f(x) ";
}
else
{
sot2 = "- f(x) ";
}
}
if (t2 < 0)
{
if (Math.Round(t2, 3) != -1)
{
sot2 = "+ " + Math.Round(-t2, 3) + "f(x) ";
}
else
{
sot2 = "+ f(x) ";
}
}
//t1
pt[6].Image = Properties.Resources.daungoac;
pt[6].Location = new Point(40, 175);
pt[6].Size = new Size(27, 58);
lg[7].Text = "t = " + Math.Round(t1, 3);
lg[7].Location = new Point(70, 175);
lg[8].Text = "t = " + Math.Round(t2, 3);
lg[8].Location = new Point(70, 205);
lg[9].Text = "Với " + lg[7].Text + " => = " + Math.Round(t1, 3) + " => " + sot1 + sok + " = 0";
lg[9].Location = new Point(30, 255);
pt[7].Image = Properties.Resources.kchiafx;
pt[7].Location = new Point(110 + (lg[7].Text.Length - 4) * 7, 235);
pt[7].Size = new Size(118, 64);
pt[8].Image = Properties.Resources.fxbinh;
pt[8].Location = new Point((("Với " + lg[7].Text + " => = " + Math.Round(t1, 3) + " =>").Length - 16) * 8 + 10, 249);
pt[8].Size = new Size(47, 37);
if (d1 < 0)
{
lg[9].Text = lg[9].Text + " (vô nghiệm)";
}
if (d1 == 0)
{
lg[9].Text = lg[9].Text + "=> f(x) = " + Math.Round(x1, 3);
}
if (d1 > 0)
{
lg[9].Text = lg[9].Text + " => ";
pt[9].Image = Properties.Resources.daungoac;
pt[9].Location = new Point(50 + lg[9].Text.Length * 5, 240);
pt[9].Size = new Size(27, 58);
lg[10].Text = "f(x) = " + Math.Round(x1, 3);
lg[10].Location = new Point(85 + lg[9].Text.Length * 5, 240);
lg[11].Text = "f(x) = " + Math.Round(x2, 3);
lg[11].Location = new Point(85 + lg[9].Text.Length * 5, 270);
}
//t2
lg[14].Text = "Với " + lg[8].Text + " => = " + Math.Round(t2, 3) + " => " + sot2 + sok + " = 0";
lg[14].Location = new Point(30, 320);
pt[12].Image = Properties.Resources.kchiafx;
pt[12].Location = new Point(110 + (lg[8].Text.Length - 4) * 7, 300);
pt[12].Size = new Size(118, 64);
pt[13].Image = Properties.Resources.fxbinh;
pt[13].Location = new Point((("Với " + lg[8].Text + " => = " + Math.Round(t2, 3) + " =>").Length - 16) * 8 + 10, 314);
pt[13].Size = new Size(47, 37);
if (d2 < 0)
{
lg[14].Text = lg[14].Text + " (vô nghiệm)";
}
if (d2 == 0)
{
lg[14].Text = lg[14].Text + "=> f(x) = " + Math.Round(x3, 3);
}
if (d2 > 0)
{
lg[14].Text = lg[14].Text + " => ";
pt[10].Image = Properties.Resources.daungoac;
pt[10].Location = new Point(50 + lg[9].Text.Length * 5, 305);
pt[10].Size = new Size(27, 58);
lg[15].Text = "f(x) = " + Math.Round(x3, 3);
lg[15].Location = new Point(85 + lg[9].Text.Length * 5, 305);
lg[16].Text = "f(x) = " + Math.Round(x4, 3);
lg[16].Location = new Point(85 + lg[9].Text.Length * 5, 335);
}
}
lg[17].Text = "Do f(x) = " + ham;
lg[17].Location = new Point(30, 365);
lg[18].Text = kq[1];
lg[18].Location = new Point(40, 395);
lg[19].Text = kq[2];
lg[19].Location = new Point(40, 425);
lg[20].Text = kq[3];
lg[20].Location = new Point(40, 455);
lg[21].Text = kq[4];
lg[21].Location = new Point(40, 485);
lg[22].Text = kq[5];
lg[22].Location = new Point(300, 395);
lg[23].Text = kq[6];
lg[23].Location = new Point(300, 425);
lg[24].Text = kq[7];
lg[24].Location = new Point(300, 455);
lg[25].Text = kq[8];
lg[25].Location = new Point(300, 485);
for (int i = 1; i < 20; i++)
{
loigiai.Controls.Add(pt[i]);
}
for (int i = 1; i < 30; i++)
{
loigiai.Controls.Add(lg[i]);
}
loigiai.Size = new Size(800, 600);
loigiai.ShowDialog();
}
private void Button2_Click(object sender, EventArgs e)
{
this.AcceptButton = button4;
Label[] lg = new Label[20];
LoiGiai loigiai = new LoiGiai();
loigiai.AutoScroll = true;
Label mau = new Label();
mau.Font = new Font("VNF-Comic Sans", 12);
for (int i = 1; i < 20; i++)
{
pt[i] = new PictureBox();
pt[i].Size = new Size(0, 0);
loigiai.Controls.Add(pt[i]);
}
for (int i = 1; i < 20; i++)
{
lg[i] = new Label();
lg[i].Font = mau.Font;
lg[i].AutoSize = true;
lg[i].Text = "";
lg[i].Size = new Size(0, 0);
loigiai.Controls.Add(lg[i]);
}
lg[1].Text = "+) Xét cos(x) = 0 =>"; // sin(x)^1 = 1";
lg[1].Location = new Point(20, 20);
pt[1].Image = Properties.Resources.sinb;
pt[1].Size = new Size(64, 30);
pt[1].Location = new Point(15 + lg[1].Width, 17);
lg[1].Text = lg[1].Text + " = 1";
if (a == d)
{
lg[2].Text = "Do " + Math.Round(a, 4) + " = " + Math.Round(d, 4) + " => π/2 + kπ là nghiệm của phương trình";
kt = true;
}
else
{
lg[2].Text = "Do " + Math.Round(a, 4) + " ≠ " + Math.Round(d, 4) + " => π/2 + kπ không là nghiệm của phương trình";
}
lg[2].Location = new Point(30, 45);
lg[3].Text = "+) Xét cos(x) ≠ 0, chia cả 2 vế của (*) cho cos(x)^2, ta được: ";
lg[3].Location = new Point(20, 70);
if (a >= 0)
{
if (Math.Round(a, 3) != 1)
{
soa = Math.Round(a, 3) + "";
}
}
if (a < 0)
{
if (Math.Round(a, 3) != -1)
{
soa = "- " + Math.Round(-a, 3);
}
else
{
soa = "- ";
}
}
if (b >= 0)
{
if (Math.Round(b, 3) != 1)
{
sob = "+ " + Math.Round(b, 3);
}
else
{
sob = "+ ";
}
}
if (b < 0)
{
if (Math.Round(b, 3) != -1)
{
sob = "- " + Math.Round(-b, 3);
}
else
{
sob = "- ";
}
}
if (c >= 0)
{
soc = "+ " + Math.Round(c, 3);
}
if (c < 0)
{
soc = "- " + Math.Round(-c, 3);
}
if (d >= 0)
{
if (Math.Round(d, 3) != 1)
{
sod = "" + Math.Round(d, 3);
}
}
if (d < 0)
{
if (Math.Round(d, 3) != -1)
{
sod = "- " + Math.Round(-d, 3);
}
else
{
sod = "- ";
}
}
lg[4].Text = soa;
lg[4].Location = new Point(100, 120);
pt[2].Image = Properties.Resources.sinchiacos;
pt[2].Size = new Size(91, 65);
pt[2].Location = new Point(95 + lg[4].Width, 100);
lg[4].Text = lg[4].Text + " " + sob;
pt[3].Image = Properties.Resources.sincoschiacos;
pt[3].Size = new Size(110, 65);
pt[3].Location = new Point(95 + lg[4].Width, 100);
lg[4].Text = lg[4].Text + " " + soc;
pt[4].Image = Properties.Resources.coschiacos;
pt[4].Size = new Size(91, 68);
pt[4].Location = new Point(95 + lg[4].Width, 100);
lg[4].Text = lg[4].Text + " = " + sod;
pt[5].Image = Properties.Resources._1chiacos;
pt[5].Size = new Size(95, 68);
pt[5].Location = new Point(95 + lg[4].Width, 100);
if (a - d >= 0)
{
if (Math.Round(a - d, 3) != 1)
{
soa = Math.Round(a - d, 3) + "";
}
}
if (a - d < 0)
{
if (Math.Round(a - d, 3) != -1)
{
soa = "- " + Math.Round(a - d, 3);
}
else
{
soa = "- ";
}
}
if (b >= 0)
{
if (Math.Round(b, 3) != 1)
{
sob = "+ " + Math.Round(b, 3) + "tan(x) ";
}
else
{
sob = "+ tan(x) ";
}
}
if (b < 0)
{
if (Math.Round(b, 3) != -1)
{
sob = "- " + Math.Round(-b, 3) + "tan(x) ";
}
else
{
sob = "- tan(x) ";
}
}
if (c >= 0)
{
soc = "+ " + Math.Round(c, 3);
}
if (c < 0)
{
soc = "- " + Math.Round(-c, 3);
}
lg[5].Text = "<=> " + soa;// + sob + soc + " = 0 (1)";
lg[5].Location = new Point(65, 170);
pt[6].Image = Properties.Resources.tanb;
pt[6].Size = new Size(64, 30);
pt[6].Location = new Point(60 + lg[5].Width, 166);
lg[5].Text = lg[5].Text + " " + sob + soc + " = 0 (1)";
lg[6].Text = "Đặt t = tan(x), giải (1) ta được: ";
lg[6].Location = new Point(30, 195);
if (giai.d < 0)
{
lg[7].Text = " (1) vô nghiệm";
lg[7].Location = new Point(60, 220);
}
if (giai.d == 0)
{
lg[7].Text = "t = " + Math.Round(giai.x) + " => tan(x) = " + Math.Round(giai.x);
if ((Math.Abs(giai.x - Math.PI / 2) <= 0.000000001))
{
lg[7].Text = lg[7].Text + " (loại)";
}
else
{
lg[7].Text = lg[7].Text + " => " + ngh2;
}
lg[7].Location = new Point(60, 220);
}
if (giai.d > 0)
{
if (giai.kt == 1)
{
lg[7].Location = new Point(60, 220);
lg[7].Text = "(1) có vô số nghiệm";
lg[8].Location = new Point(60, 245);
lg[8].Text = "(vì a,b,c = 0)";
lg[9].Location = new Point(60, 270);
lg[9].Text = "=> (*) có vô số nghiệm x = arctan(t) (t ≠ π/2 + kπ)";
}
else
if (giai.kt == 2)
{
lg[7].Location = new Point(60, 220);
lg[7].Text = "(1) vô nghiệm";
lg[8].Location = new Point(60, 245);
lg[8].Text = "(vì a,b = 0, c ≠ 0)";
lg[9].Location = new Point(60, 170);
lg[9].Text = "=> (*) vô nghiệm";
}
else
{
lg[7].Text = "t = " + Math.Round(giai.x1) + "=> tan(x) = " + Math.Round(giai.x1);
if ((Math.Abs(giai.x1 - Math.PI / 2) <= 0.000000001))
{
lg[7].Text = lg[7].Text + " (loại)";
}
else
{
lg[7].Text = lg[7].Text + "=> " + ngh2;
}
lg[7].Location = new Point(60, 220);
lg[8].Text = "t = " + Math.Round(giai.x2) + "=> tan(x) = " + Math.Round(giai.x2);
if ((Math.Abs(giai.x2 - Math.PI / 2) <= 0.000000001))
{
lg[8].Text = lg[8].Text + " (loại)";
}
else
{
lg[8].Text = lg[8].Text + "=> " + ngh3;
}
lg[8].Location = new Point(60, 245);
}
}
if (ngh1 == "" && ngh2 == "" && ngh3 == "")
{
lg[9].Text = "Vậy phương trình (*) vô nghiệm";
lg[9].Location = new Point(30, 270);
}
else
{
lg[9].Text = "Vậy phương trình (*) có nghiệm:";
lg[9].Location = new Point(30, 270);
int dong = 270;
if (ngh1 != " ")
{
dong = dong + 25;
lg[10].Text = ngh1;
lg[10].Location = new Point(60, dong);
}
if (ngh2 != " ")
{
dong = dong + 25;
lg[11].Text = ngh2;
lg[11].Location = new Point(60, dong);
}
if (ngh3 != " ")
{
dong = dong + 25;
lg[12].Text = ngh3;
lg[12].Location = new Point(60, dong);
}
}
Button button3 = new Button();
button3.Text = "Hướng dẫn giải tổng quát";
button3.Font = button1.Font;
button3.Size = new Size(200, 40);
button3.Location = new Point(40, 360);
loigiai.Controls.Add(button3);
button3.Click += Button3_Click;
loigiai.Size = new Size(650, 450);
loigiai.AutoSize = true;
loigiai.ShowDialog();
}
private void Button2_Click(object sender, EventArgs e)
{
this.AcceptButton = button4;
Label[] lg = new Label[20];
LoiGiai loigiai = new LoiGiai();
for (int i = 1; i < 20; i++)
{
pt[i] = new PictureBox();
pt[i].Size = new Size(0, 0);
loigiai.Controls.Add(pt[i]);
}
for (int i = 1; i < 20; i++)
{
lg[i] = new Label();
}
for (int i = 1; i < 20; i++)
{
lg[i].Font = new Font("VNF-Comic Sans", 12);
lg[i].AutoSize = true;
lg[i].Text = "";
lg[i].Size = new Size(0, 0);
}
for (int i = 1; i < 20; i++)
{
loigiai.Controls.Add(lg[i]);
}
lg[1].Text = "+) Xét cos(x) = 0 => ";
lg[1].Location = new Point(20, 30);
pt[1].Image = Properties.Resources.sinb;
pt[1].Size = new Size(60, 31);
pt[1].Location = new Point(15 + lg[1].Width, 25);
lg[1].Text = lg[1].Text + " = 1";
if (a == 0)
{
lg[2].Text = "Do " + Math.Round(a, 4) + " = " + 0 + " => π/2 + kπ là nghiệm của phương trình";
kt = true;
}
else
{
lg[2].Text = "Do " + Math.Round(a, 4) + " ≠ " + 0 + " => π/2 + kπ không là nghiệm của phương trình";
}
lg[2].Location = new Point(30, 60);
lg[3].Text = "+) Xét cos(x) ≠ 0, chia cả 2 vế của (*) cho";
lg[3].Location = new Point(30, 90);
pt[2].Image = Properties.Resources.cosmu3;
pt[2].Size = new Size(64, 30);
pt[2].Location = new Point(lg[3].Width + 25, 88);
lg[3].Text = lg[3].Text + " , ta được:";
lg[4].Text = "(*) <=> " + soa;// + sob + soc + sod + " = 0";
lg[4].Location = new Point(30, 120);
pt[3].Image = Properties.Resources.tanmu3;
pt[3].Size = new Size(64, 30);
pt[3].Location = new Point(25 + lg[4].Width, 117);
lg[4].Text = lg[4].Text + " " + sob;
pt[4].Image = Properties.Resources.tanx;
pt[4].Size = new Size(60, 30);
pt[4].Location = new Point(25 + lg[4].Width, 122);
lg[4].Text = lg[4].Text + " " + soc + sod + " = 0";
if (a + g >= 0)
{
if (Math.Round(a + g, 3) != 1)
{
soa = Math.Round(a + g, 3) + "";
}
}
if (a + g < 0)
{
if (Math.Round(a + g, 3) != -1)
{
soa = "-" + Math.Round(-a - g, 3);
}
}
if (b + f >= 0)
{
if (Math.Round(b + f, 3) != 1)
{
sob = " + " + Math.Round(b + f, 3);
}
else
{
sob = "+ ";
}
}
if (b + f < 0)
{
if (Math.Round(b + f, 3) != -1)
{
sob = "- " + Math.Round(-b - f, 3);
}
else
{
sob = "- ";
}
}
if (c + g > 0)
{
if (Math.Round(c + g, 3) != 1)
{
soc = "+ " + Math.Round(c + g, 3) + "t ";
}
}
if (c + g < 0)
{
if (Math.Round(c + g, 3) != -1)
{
soc = "- " + Math.Round(-c - g, 3) + "t ";
}
}
if (d + f > 0)
{
sod = "+ " + Math.Round(d + f, 3);
}
if (d + f < 0)
{
sod = "- " + Math.Round(-d - f, 3);
}
lg[5].Text = "Đặt t = tan(x), ta được";
lg[5].Location = new Point(30, 150);
lg[6].Text = " " + soa;// + sob + soc + sod + " = 0 (1)";
lg[6].Location = new Point(30, 180);
pt[5].Image = Properties.Resources.tmu3;
pt[5].Size = new Size(23, 23);
pt[5].Location = new Point(25 + lg[6].Width, 178);
lg[6].Text = lg[6].Text + " " + sob;
pt[6].Image = Properties.Resources.tbinh;
pt[6].Size = new Size(23, 23);
pt[6].Location = new Point(25 + lg[6].Width, 180);
lg[6].Text = lg[6].Text + " " + soc + sod + " = 0";
lg[7].Text = "Giải (1) ta được:";
lg[7].Location = new Point(30, 210);
int dong = 210;
if (a == 0)
{
lg[8].Text = "t = 0 => tan(x) = 0";
lg[8].Location = new Point(30, dong + 30);
dong = dong + 30;
}
if (giai.conghiem1)
{
lg[9].Text = "t = " + Math.Round(giai.x1, 3) + " => tan(x) = " + Math.Round(giai.x1, 3);
lg[9].Location = new Point(30, dong + 30);
dong = dong + 30;
}
if (giai.conghiem2)
{
lg[10].Text = "t = " + Math.Round(giai.x2, 3) + " => tan(x) = " + Math.Round(giai.x2, 3);
lg[10].Location = new Point(30, dong + 30);
dong = dong + 30;
}
if (giai.conghiem3)
{
lg[11].Text = "t = " + Math.Round(giai.x3, 3) + " => tan(x) = " + Math.Round(giai.x3, 3);
lg[11].Location = new Point(30, dong + 30);
dong = dong + 30;
}
if (ngh1 == "" && ngh2 == "" && ngh3 == "" && ngh4 == "")
{
lg[12].Text = "=> (*) vô nghiệm:";
lg[12].Location = new Point(20, dong + 30);
}
else
{
lg[12].Text = "=> (*) có nghiệm:";
lg[12].Location = new Point(20, dong + 30);
dong = dong + 30;
if (ngh1 != "")
{
lg[13].Text = ngh1;
lg[13].Location = new Point(30, dong + 30);
dong = dong + 30;
}
if (ngh2 != "")
{
lg[14].Text = ngh2;
lg[14].Location = new Point(30, dong + 30);
dong = dong + 30;
}
if (ngh3 != "")
{
lg[15].Text = ngh3;
lg[15].Location = new Point(30, dong + 30);
dong = dong + 30;
}
if (ngh4 != "")
{
lg[16].Text = ngh4;
lg[16].Location = new Point(30, dong + 30);
dong = dong + 30;
}
}
Button button3 = new Button();
button3.Text = "Hướng dẫn giải tổng quát";
button3.Font = button1.Font;
button3.Size = new Size(200, 40);
button3.Location = new Point(40, 480);
loigiai.Controls.Add(button3);
button3.Click += Button3_Click;
for (int i = 1; i < 20; i++)
{
loigiai.Controls.Add(lg[i]);
}
loigiai.AutoSize = true;
loigiai.Size = new Size(550, 620);
loigiai.Controls.Add(button3);
loigiai.ShowDialog();
}
private void Button2_Click(object sender, EventArgs e)
{
this.AcceptButton = button4;
LoiGiai loigiai = new LoiGiai();
PictureBox ptb1 = new PictureBox();
loigiai.Controls.Add(ptb1);
PictureBox pt = new PictureBox();
loigiai.Controls.Add(pt);
Label mau = new Label();
mau.Font = new Font("VNF-Comic Sans", 12);
for (int i = 1; i < 20; i++)
{
lg[i] = new Label();
lg[i].Font = mau.Font;
lg[i].AutoSize = true;
lg[i].Text = "";
loigiai.Controls.Add(lg[i]);
}
if (radioButton1.Checked == true)
{
lg[1].Text = "Đặt t = sin(x) + cos(x) => sin(x)cos(x) =";
}
else
{
lg[1].Text = "Đặt t = cos(x) - sin(x) => sin(x)cos(x) =";
}
lg[1].Location = new Point(30, 40);
if (radioButton1.Checked == true)
{
ptb1.BackgroundImage = Properties.Resources.t_1chia2;
}
else
{
ptb1.BackgroundImage = Properties.Resources._1_tchia2;
}
ptb1.Location = new Point();
ptb1.Size = new Size(71, 68);
ptb1.Location = new Point(325, 20);
lg[2].Text = "(|t| <= sqrt(2)), ta được:";
lg[2].Location = new Point(400, 40);
if (b >= 0)
{
if (Math.Round(b, 3) != 1)
{
soa = Math.Round(b, 3) + "";
}
}
if (b < 0)
{
if (Math.Round(b, 3) != -1)
{
soa = "-" + Math.Round(-b, 3);
}
else
{
soa = "- ";
}
}
if (a > 0)
{
if (Math.Round(a, 3) != 1)
{
sob1 = "+ " + 2 * Math.Round(a, 3) + "t ";
sob2 = "- " + 2 * Math.Round(a, 3) + "t ";
}
else
{
sob1 = "+ t ";
sob2 = "- t ";
}
}
if (a < 0)
{
if (Math.Round(b, 3) != -1)
{
sob1 = "- " + 2 * Math.Round(-a, 3) + "t ";
sob2 = "+ " + 2 * Math.Round(-a, 3) + "t ";
}
else
{
sob1 = "- t ";
sob2 = "+ t ";
}
}
if (b + 2 * c > 0)
{
soc = "= " + Math.Round(b + 2 * c, 3);
}
if (b + 2 * c < 0)
{
soc = "= -" + Math.Round(-(b + 2 * c), 3);
}
lg[3].Text = soa;
pt.Image = Properties.Resources.tbinh;
pt.Size = new Size(23, 23);
pt.Location = new Point(95 + lg[3].Width, 80);
if (radioButton1.Checked)
{
lg[3].Text = lg[3].Text + " " + sob1 + soc;
}
else
{
lg[3].Text = lg[3].Text + " " + sob2 + soc;
}
lg[3].Location = new Point(100, 80);
lg[4].Text = "Giải (1) ta được:";
lg[4].Location = new Point(40, 105);
if (giai.d < 0)
{
lg[5].Text = "(1) vô nghiệm";
}
if (giai.d == 0)
{
lg[5].Text = "t = " + Math.Round(x, 4);
if (Math.Abs(x) > Math.Sqrt(2))
{
lg[5].Text = lg[5].Text + " => loại";
}
}
if (giai.d > 0)
{
lg[5].Text = "t = " + Math.Round(x1, 4);
if (Math.Abs(x1) > Math.Sqrt(2))
{
lg[5].Text = lg[5].Text + " => loại";
}
lg[6].Text = "t = " + Math.Round(x2, 4);
if (Math.Abs(x2) > Math.Sqrt(2))
{
lg[6].Text = lg[6].Text + " => loại";
}
}
lg[5].Location = new Point(60, 130);
lg[6].Location = new Point(60, 155);
if (giai.d < 0)
{
lg[7].Text = "Vậy phương trình vô nghiệm";
}
else
{
lg[7].Text = "Vậy phương trình có nghiệm:";
lg[8].Text = kq[1];
lg[9].Text = kq[2];
lg[10].Text = kq[3];
lg[11].Text = kq[4];
lg[7].Location = new Point(40, 180);
lg[8].Location = new Point(60, 205);
lg[9].Location = new Point(60, 230);
lg[10].Location = new Point(60, 255);
lg[11].Location = new Point(60, 280);
}
Button button3 = new Button();
button3.Text = "Hướng dẫn giải tổng quát";
button3.Font = button1.Font;
button3.Size = new Size(200, 40);
button3.Location = new Point(40, 320);
loigiai.Controls.Add(button3);
button3.Click += Button3_Click;
loigiai.Size = new Size(800, 450);
loigiai.ShowDialog();
}
private void Button2_Click(object sender, EventArgs e)
{
this.AcceptButton = button4;
LoiGiai loigiai = new LoiGiai();
for (int i = 1; i < 30; i++)
{
lg[i] = new Label();
lg[i].Font = new Font("VNF-Comic Sans", 12);
lg[i].AutoSize = true;
lg[i].Size = new Size(0, 0);
pt[i] = new PictureBox();
pt[i].Size = new Size(0, 0);
}
for (int i = 1; i < 30; i++)
{
loigiai.Controls.Add(pt[i]);
}
for (int i = 1; i < 30; i++)
{
loigiai.Controls.Add(lg[i]);
}
lg[1].Text = "Đặt t = " + som + "tan(x) " + sonc + "cot(x) ";
lg[1].Location = new Point(30, 30);
lg[2].Text = "=> " + somb;
lg[2].Location = new Point(30, 60);
pt[1].Image = Properties.Resources.tanx;
pt[1].Location = new Point(25 + lg[2].Width, 62);
pt[1].Size = new Size(63, 24);
lg[2].Text = lg[2].Text + " " + sonb;
pt[2].Image = Properties.Resources.cotx;
pt[2].Location = new Point(25 + lg[2].Width, 62);
pt[2].Size = new Size(63, 24);
lg[2].Text = lg[2].Text + " = ";
pt[3].Image = Properties.Resources.tbinh;
pt[3].Location = new Point(lg[2].Width + 25, 54);
pt[3].Size = new Size(27, 25);
pt[3].SizeMode = PictureBoxSizeMode.StretchImage;
lg[2].Text = lg[2].Text + " " + somn;
lg[3].Text = "=> (*) <=> " + soa + "(";
lg[3].Location = new Point(30, 90);
pt[4].Image = Properties.Resources.tbinh;
pt[4].Location = new Point(lg[3].Width + 25, 84);
pt[4].Size = new Size(27, 25);
lg[3].Text = lg[3].Text + " " + somn + ") " + sob + soc + " = 0";
lg[4].Text = "<=> " + soa;
lg[4].Location = new Point(75, 120);
pt[5].Image = Properties.Resources.tbinh;
pt[5].Size = new Size(27, 25);
pt[5].Location = new Point(lg[4].Width + 70, 114);
lg[4].Text += " " + sob + socamn + " = 0";
if (d < 0)
{
lg[4].Text = lg[4].Text + " (vô nghiệm)";
}
if (d == 0)
{
lg[5].Text = "<=> t = " + Math.Round(t1, 3);
lg[5].Location = new Point(75, 150);
lg[6].Text = " => " + som + "tan(x) " + sonc + "cot(x) = " + Math.Round(t1, 3);
lg[6].Location = new Point(75, 180);
lg[7].Text = "<=> " + som;
lg[7].Location = new Point(75, 210);
pt[6].Image = Properties.Resources.tanx;
pt[6].Size = new Size(63, 24);
pt[6].Location = new Point(lg[7].Width + 25, 212);
lg[7].Text += " " + sot1 + son;
}
if (d > 0)
{
lg[5].Text = "<=>";
lg[5].Location = new Point(75, 165);
pt[6].Image = Properties.Resources.daungoac;
pt[6].Size = new Size(27, 58);
pt[6].Location = new Point(100, 150);
lg[6].Text = "t = " + Math.Round(t1, 3);
lg[6].Location = new Point(130, 150);
lg[7].Text = "t = " + Math.Round(t2, 3);
lg[7].Location = new Point(130, 180);
//t1
lg[8].Text = "Với t = " + Math.Round(t1, 3) + " => " + som + "tan(x) " + son + "cot(x) = " + Math.Round(t1, 3) + " => " + som;
if (d1 <= 0)
{
lg[8].Location = new Point(30, 210);
}
else
{
lg[8].Location = new Point(30, 225);
}
pt[7].Image = Properties.Resources.tanx;
pt[7].Size = new Size(63, 24);
if (d1 <= 0)
{
pt[7].Location = new Point(lg[8].Size.Width + 25, 212);
}
else
{
pt[7].Location = new Point(lg[8].Size.Width + 25, 227);
}
lg[8].Text = lg[8].Text + " " + sot1 + son + " = 0";
if (d1 < 0)
{
lg[8].Text = lg[8].Text + " (vô nghiệm)";
}
if (d1 == 0)
{
lg[8].Text = lg[8].Text + " => tan(x) = " + Math.Round(x1, 3);
}
if (d1 > 0)
{
lg[8].Text = lg[8].Text + " => ";
pt[8].Image = Properties.Resources.daungoac;
pt[8].Size = new Size(27, 58);
pt[8].Location = new Point(lg[8].Width + 30, 210);
lg[9].Text = "tan(x) = " + Math.Round(x1, 3);
lg[9].Location = new Point(lg[8].Width + 60, 210);
lg[10].Text = "tan(x) = " + Math.Round(x2, 3);
lg[10].Location = new Point(lg[8].Width + 60, 240);
}
//t2
lg[11].Text = "Với t = " + Math.Round(t2, 3) + " => " + som + "tan(x) " + son + "cot(x) = " + Math.Round(t2, 3) + " => " + som;
if (d2 <= 0)
{
lg[11].Location = new Point(30, 270);
}
else
{
lg[11].Location = new Point(30, 285);
}
pt[9].Image = Properties.Resources.tanx;
pt[9].Size = new Size(63, 24);
if (d2 <= 0)
{
pt[9].Location = new Point(lg[11].Width + 25, 272);
}
else
{
pt[9].Location = new Point(lg[11].Width + 25, 287);
}
lg[11].Text += " " + sot2 + son + " = 0";
if (d2 < 0)
{
lg[11].Text += " (vô nghiệm)";
}
if (d2 == 0)
{
lg[11].Text += " => tan(x) = " + Math.Round(x3, 3);
}
if (d2 > 0)
{
lg[11].Text += " => ";
pt[10].Image = Properties.Resources.daungoac;
pt[10].Size = new Size(27, 58);
pt[10].Location = new Point(lg[11].Width + 30, 270);
lg[12].Text = "tan(x) = " + Math.Round(x3, 3);
lg[12].Location = new Point(lg[11].Width + 60, 270);
lg[13].Text = "tan(x) = " + Math.Round(x4, 3);
lg[13].Location = new Point(lg[11].Width + 60, 300);
}
}
lg[14].Text = "Phương trình có nghiệm: ";
lg[14].Location = new Point(30, 330);
lg[15].Text = kq[1];
lg[15].Location = new Point(40, 360);
lg[16].Text = kq[2];
lg[16].Location = new Point(40, 390);
lg[17].Text = kq[3];
lg[17].Location = new Point(40, 420);
lg[18].Text = kq[4];
lg[18].Location = new Point(40, 450);
Button button3 = new Button();
button3.Text = "Hướng dẫn giải tổng quát";
button3.Font = button1.Font;
button3.Size = new Size(200, 40);
button3.Location = new Point(40, 480);
loigiai.Controls.Add(button3);
button3.Click += Button3_Click;
loigiai.Size = new Size(800, 600);
loigiai.ShowDialog();
}
