SOLUTION: i need to prove that these are equal..... cot^2x-1/1+cot^2x=1-2sin^2x

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Question 861255: i need to prove that these are equal..... cot^2x-1/1+cot^2x=1-2sin^2x
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
prove that these are equal.....
cot^2x-1/1+cot^2x=1-2sin^2x
%28cot%5E2%28x%29-1%29%2F%28cot%5E2%28x%29%2B1%29=1-2sin%5E2%28x%29%29
start with left side:

...

...
cos%5E2%28x%29-sin%5E2%28x%29=1-sin%5E2%28x%29-sin%5E2%28x%29=1-2sin%5E2%28x%29
...
verified: left side=right side