cos method
Calculates the cosine of this complex number.
Implementation
Complex cos() => Complex(
math.cos(real) * _cosh(imaginary),
-math.sin(real) * _sinh(imaginary),
);
Calculates the cosine of this complex number.
Complex cos() => Complex(
math.cos(real) * _cosh(imaginary),
-math.sin(real) * _sinh(imaginary),
);