tan

/*
 *  call-seq:
 *     Math.tan(x)    => float
 *  
 *  Returns the tangent of <i>x</i> (expressed in radians).
 */

static VALUE
math_tan(obj, x)
    VALUE obj, x;
{
    Need_Float(x);

    return rb_float_new(tan(RFLOAT(x)->value));
}