Given that , find and show that
Please help. I have tried to use the two trig calculus rules that I know but I can't seem to get them to work.
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We know that .
You must be differentiating incorrectly . . . Given that: . , .find
and show that: .
We have: .
Can you tell me how you got from cos2x to -2sin2x?
I know that cosx = -sinx but the 2x confused me
Last edited by greghunter; Jun 27th 2009 at 11:39 AM.
Originally Posted by Amer chain rule thanks, i don't think i've been taught the chain rule yet
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