SOLUTION: I cannot solve this one.... verify the identity... cos^2(x)-sin^2(x) ----------- ----- = cos^2(x) 1-tan^2(x)

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Question 13574: I cannot solve this one....
verify the identity...
cos^2(x)-sin^2(x)
----------------- = cos^2(x)
1-tan^2(x)
Answer by rahman(247) About Me  (Show Source):
You can put this solution on YOUR website!
Proof:
cos^2(x)-sin^2(x)
-----------------
1-tan^2(x)
=%28%28cos+x+%2B+sin+x%29%28cos+x+-+sin+x%29%29%2F%28%281%2Btan+x%29%281-tan+x%29%29
=
=
=
=
=cos+x%2Acos+x
=cos%5E2%28x%29
OK