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September 1, 2015

Homework Help: Math

Posted by Kate on Monday, July 18, 2011 at 11:30am.

Prove each identity:
a) 1-cos^2x=tan^2xcos^2x
b) cos^2x + 2sin^2x-1 = sin^2x

I also tried a question on my own:
tan^2x = (1 cos^2x)/cos^2x
R.S.= sin^2x/cos^2x
I know that the Pythagorean for that is sin^2x + cos^2x
That's all I could do.

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