Hi there .. I'm not sure how to approach this question and I would greatly appreciate it if someone could help me :)

Thanks a bunch .

Here's the question :

Prove the identity .

sin^4x - cos^4x = sin^2x - cos^2x

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- November 16th 2006, 07:47 PMasiankattTrigonometic Identities
Hi there .. I'm not sure how to approach this question and I would greatly appreciate it if someone could help me :)

Thanks a bunch .

Here's the question :

Prove the identity .

sin^4x - cos^4x = sin^2x - cos^2x - November 16th 2006, 07:53 PMThePerfectHacker
- November 16th 2006, 07:57 PMasiankatt=)
Thanks a lot =) Now that I look at it .. it is really simple :S

.... I have another question if you dont mind answering it ...

Prove the indentity .

4/cos^2x - 5 = 4tan^2 x - 1 - November 16th 2006, 08:05 PMThePerfectHacker