private void btnDiv_Click(object sender, EventArgs e)
{
double polar = Convert.ToDouble(txtMDPol1.Text);
int angle = Convert.ToInt16(txtMDPolAngel1.Text);
cn one = new cn(polar, angle);
polar = Convert.ToDouble(txtMDPol2.Text);
angle = Convert.ToInt16(txtMDPolAngle2.Text);
cn two = new cn(polar, angle);
txtMDPolTotal.Text = Convert.ToString(one.getPolarDouble() / two.getPolarDouble());
txtMDPolAngleTotal.Text = Convert.ToString(one.getAngleInt() - two.getAngleInt());
}