Function cos [src]

Returns the cosine of z.

Prototype

pub fn cos(z: anytype) Complex(@TypeOf(z.re, z.im))

Example

 test cos {
    const epsilon = math.floatEps(f32);
    const a = Complex(f32).init(5, 3);
    const c = cos(a);

    try testing.expectApproxEqAbs(2.8558152, c.re, epsilon);
    try testing.expectApproxEqAbs(9.606383, c.im, epsilon);
}

Source

  pub fn cos(z: anytype) Complex(@TypeOf(z.re, z.im)) {
    const T = @TypeOf(z.re, z.im);
    const p = Complex(T).init(-z.im, z.re);
    return cmath.cosh(p);
}  