I can, for the mort part, understand how to derive and "proof" most of my Identity work, but some of the more complex (in my feeble opinion) problems give me quite a bit of trouble.(adsbygoogle = window.adsbygoogle || []).push({});

Can anyone explain these?

"Use the fundamental identities to simplify to sines and cosines:

tan(^2)x - (csc(^2)x/cot(^2)x) "

Someone told me the answer was (-1) and I had no idea how to get that.

and

"Confirm the Identity:

(sinx)/(1-cosx) + (sinx)/(1+cosx) = 2cscx"

Any explanations would be greatly appreciated! Thanks!

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# Trigonometric Identities

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