method

atan

v2_1_10 - Show latest stable - Class: Math

atan(p1)

public

Computes the arc tangent of x. Returns -PI/2..PI/2.

Domain: (-INFINITY, INFINITY)

Codomain: (-PI/2, PI/2)

Math.atan(0) #=> 0.0

static VALUE
math_atan(VALUE obj, VALUE x)
{
    Need_Float(x);
    return DBL2NUM(atan(RFLOAT_VALUE(x)));
}