2009-10-20, 09:17 PM
Wait. Can you explain why sin 2arcsin 12/13 = sin 2A? I got everything else, except that.
I included the sin^- 1 part because some schools don't teach arcsin, instead using sin^-1. For some reason.
I included the sin^- 1 part because some schools don't teach arcsin, instead using sin^-1. For some reason.

