I have some questions on DAT acheiver that require you to know:
Double angle formulas for sine and cosine
sin 2t = 2 sin t cos t
cos 2t = cos2 t sin2 t = 2 cos2 t 1 = 1 2 sin2 t
and the questions arent even straight forward. They require you to simplify a more complex expression into one of the answer choices. Is this something that is really necessary? I was thinking the more basic trig identities were sufficient.