method

cos

Ruby latest stable (v2_5_5) - 0 notes - 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

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static VALUE
math_cos(VALUE unused_obj, VALUE x)
{
    return DBL2NUM(cos(Get_Double(x)));
}