cos 180-x sin x, cos x cos 180-x, cos 180 and sin 180, sinx cos 180-x, cos 180+x, cos 180-x is equal to, sin cos tan 180, sin 180 - x, cos 180 - cos 0, sin 180 *cos 30 *tan 60, cos 0-180, cos180-x
cos 180-x sin x. There are any references about cos 180-x sin x in here. you can look below.