How someone help me prove the identity below? (1-tan^2X)(1-cos^2X)=[(sin^2X-4sin^4X)/(1-sin^2X)] Thanks in advance! =)
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Hello Hellooo Welcome to Math Help Forum! Originally Posted by Hellooo How someone help me prove the identity below? (1-tan^2X)(1-cos^2X)=[(sin^2X-4sin^4X)/(1-sin^2X)] Thanks in advance! =) I think the 4 on the RHS should be a 2. Here's my answer: , using and , using Grandad
Oh thanks, I was thinking..why was there a 4 there..
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