method

cos

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cos(p1) public

Computes the cosine of x (expressed in radians). Returns -1..1.

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

static VALUE
math_cos(obj, x)
    VALUE obj, x;
{
    Need_Float(x);
    return rb_float_new(cos(RFLOAT(x)->value));
}

cos

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