method

cos

v2_2_9 - Show latest stable - Class: Math

cos(p1)

public

Computes the cosine of x (expressed in radians). Returns a Float in the range -1.0..1.0.

Domain: (-INFINITY, INFINITY)

Codomain: [-1, 1]

Math.cos(Math::PI) #=> -1.0

static VALUE
math_cos(VALUE obj, VALUE x)
{
    Need_Float(x);
    return DBL2NUM(cos(RFLOAT_VALUE(x)));
}