I'm not sure how to prove these expressions true...the question is:

Prove that each expression is an identity for all values for which it is defined.

and,

Thank you! :D

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- Nov 21st 2010, 04:19 PMjellyksongProve this identity
I'm not sure how to prove these expressions true...the question is:

Prove that each expression is an identity for all values for which it is defined.

and,

Thank you! :D

- Nov 21st 2010, 04:24 PMharish21

divide the numerator and denominator by cosx

For the other question, show some effort. Where exactly are you stuck? - Nov 21st 2010, 04:26 PMjellyksong
Oh, wow, that was so obvious hahaha

Thanks!! :D

Any ideas on the second one? - Nov 21st 2010, 04:43 PMharish21

factorize the denominator and change all cosx into secx.. - Nov 21st 2010, 04:56 PMjellyksong
That makes sense now, thank you! :D