Would anyone mind taking a look at 2C-10 from Problem Set 4? I disagree with the answer key, I keep getting "5/2 = cos(alpha)/cos(beta)" instead of "5/2 = sin(alpha)/sin(beta)". I assume I made a mistake somewhere, but I agree with all the calculus; I got the same T' value...
(I attached the original problem and answer key below in a reply)

Question

anonymous · Answer

attachment

anonymous · Answer

The only mistake you made was in assuming that the answer provided in the course materials was correct. Actually there are mistakes in both the problem and the solution. My corrected version is attached.

anonymous · Answer

Ah, that makes much more sense. Thanks for your help!

anonymous · Answer

Oh thank goodness! This was driving me nuts!