public void Constructor_Cos()
{
IndeterminateExpression v = IndeterminateExpression.Cos('v');
v.IsOne.AssertIsFalse();
v.HasUnaryModifier.AssertIsTrue();
Assert.Throws <InvalidOperationException>(() =>
{
var _ = (char)v;
});
v.ToString().AssertIsEqualTo("Cos(v)");
v.ToPower(2).ToString().AssertIsEqualTo("Cos²(v)");
v.GetOperation('v').Value(0).AssertIsEqualTo(1);
v.GetOperation('v').Value(Math.PI / 2).AssertIsEqualTo(0);
v.ToPower(2).DerivativeBy('v').AssertIsEqualTo(-2 * Cos(Term.v) * Sin(Term.v));
v.SimplifyForConstant(0).AssertIsEqualTo(1);
v.SimplifyForConstant(Math.PI / 2).AssertIsEqualTo(0);
}
public void Cos_Variable()
{
PolynomialTerm.Cos(Term.a).AssertIsEqualTo(IndeterminateExpression.Cos('a'));
}
public static PolynomialTerm Cos(PolynomialTerm term) => IndeterminateExpression.Cos((char)term);
