/*
 *  call-seq:
 *     Math.cos(x)    => float
 *  
 *  Computes the cosine of <i>x</i> (expressed in radians). Returns
 *  -1..1.
 */

VALUE
math_cos(VALUE obj, VALUE x)
{
    Need_Float(x);
    return DOUBLE2NUM(cos(RFLOAT_VALUE(x)));
}