SOLUTION: using compound angle formula find a) tan 165 (ans -2+square root 3) b) sec 165 pls help me as am not getting same ans as in book thx lots in adv.

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Question 1119149: using compound angle formula find
a) tan 165 (ans -2+square root 3)
b) sec 165
pls help me as am not getting same ans as in book
thx lots in adv.
Answer by greenestamps(13203) About Me  (Show Source):
You can put this solution on YOUR website!


You say you got an answer that was not the answer in the book. What answer DID you get? HOW did you get it?

165 degrees is (120+45) degrees; so you are evaluating tan(120+45) and cos(120+45). The calculations should be easy if you are using the correct sum-of-angle formulas.

Re-post your question SHOWING what you did to try to get your answer and somebody here will be happy to help you.