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 .
Hello, Greg! You must be differentiating incorrectly . . . Given that: . , .find and show that: . We have: . Therefore: .
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 10:39 AM.
chain rule
Originally Posted by Amer chain rule thanks, i don't think i've been taught the chain rule yet
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