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# Trigonometric Identities watch

1. Prove that:

tan^2Ɵ - [ 1 / tan^2Ɵ]

is equal to:

[ 1 - 2cos^2Ɵ]/[ cos^2Ɵ (1 - cos^2Ɵ)]

Thanks.
2. No U.

hintage.

then make it into one fraction (on the LHS) then factorise the top then take everything into sin and cosine and then make stuff into single fractions and finally change everything into cosines.
3. Ignore this thread... I just solved it. :|
4. Okay

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Updated: July 18, 2009
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