SOLUTION: prove that coso-1 coso+1 --------- + --------- =2[1+tano] seco+tano seco-tano pls zero there means theta

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Question 13630: prove that
coso-1 coso+1
--------- + --------- =2[1+tano]
seco+tano seco-tano
pls zero there means theta
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
%28%28cosA-1%29%2F%28sexA%2BtanA%29%29+%2B+%28%28cosA%2B1%29%2F%28secA%2BtanA%29%29
multiply both terms by LCF, giving
%28cosA-1%29%28secA-tanA%29+%2B+%28cosA%2B1%29%28sexA%2BtanA%29

multiply these out, collect terms, cancel others, remember secA is 1/cosA... you will get 2+2tanA...the answer.

jon.