Here are two that I cannot seem to prove. Any and all help is appreciated.

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- June 2nd 2009, 03:56 PMPyruvateSometimes, trig identities irk me.
Here are two that I cannot seem to prove. Any and all help is appreciated.

- June 2nd 2009, 04:05 PMJhevon
start with the LHS. write as and combine the fractions in the denominator. you should see the answer almost immediately.

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as you are seeing, it is very important to know your standard trig identities for these problems - June 2nd 2009, 04:22 PMPyruvate
Oh wow, that first one was pretty obvious. Thank you very much. Unfortunately, for the second problem, I'm getting as an answer.

- June 2nd 2009, 04:34 PMJhevon
- June 2nd 2009, 04:35 PMPyruvate
Well, the 2 originated in the problem from the double-angle identity. How did you get rid of it?

- June 2nd 2009, 04:49 PMJhevon
- June 2nd 2009, 05:01 PMPyruvate
It appears that for an hour, I'd forgotten how to factor. Once again, I thank you for your help.