SOLUTION: Can you please help me verify the identity tan2x=-2tanx/sec^2x-2? Thanks!

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Question 997984: Can you please help me verify the identity tan2x=-2tanx/sec^2x-2? Thanks!
Found 2 solutions by solver91311, lwsshak3:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!















John

My calculator said it, I believe it, that settles it

Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Can you please help me verify the identity tan2x=-2tanx/sec^2x-2
start with right side
-2tanx/sec^2x-2
%28-2tan%28x%29%29%2F%28tan%5E2%28x%29%2B1-2%29
%28-2tan%28x%29%29%2F%28tan%5E2%28x%29-1%29
%282tan%28x%29%29%2F%281-tan%5E2%28x%29%29=tan2x