okay, Im not crazy then. I came up with that b4, but it wasn't one of my answer choices. Since x is in quad 2, then cos is neg and sin is posi.
Thank you.
for x it is ... you need to remember that the question is asking about $\displaystyle \cos\left(\frac{x}{2}\right)$ ... care to rethink that conclusion?
Got it! Ugh, I've been going at this solo this past weekend trying to get ahead and was finally shown today what you meant. Thank you again for the help!