I figured out the problem before, but now I have no clue what I did. Can you please help me figure this out!

The It is in the word document!

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- Mar 1st 2010, 07:08 PMF.A.S.T.[SOLVED] Another trigonometric Identity
I figured out the problem before, but now I have no clue what I did. Can you please help me figure this out!

The It is in the word document! - Mar 2nd 2010, 01:27 AMGrandad
Hello F.A.S.T.The question is this: Prove the identity:

, since , where can be anything you likeDo you follow it all now?, since - sometimes called 'the difference of two squares'

, since , for any value of

, using again, but written as

Grandad - Mar 2nd 2010, 05:43 AMF.A.S.T.
Ya, I got it!

The only step it did not get before was the 'the difference of two squares'.

Thank you very much!