Posted by hannah on Thursday, October 27, 2011 at 11:57pm.
how do u find the derivative of (csc x)^7 cos 4x???

derivatives  Reiny, Friday, October 28, 2011 at 12:04am
You should have a list handy for the basic trig function derivatives
so if y = (csc x)^7 cos 4x
dy/dx = 7(csc x)^6 ( csc x)(cotx) + 4sin(4x)
etc

derivatives  hannah, Friday, October 28, 2011 at 12:15am
Thanks. My teacher told us we need to use the chain rule in these problems, and i'm having trouble figuring out when and where to use it.

derivatives  Reiny, Friday, October 28, 2011 at 12:38am
I did use the chain rule in finding the derivative of
(csc x)^7

derivatives  hannah, Friday, October 28, 2011 at 12:50am
I know. I just realized that I messed up what goes where when I was doing it myself. My problem is applying it to other problems, esp when i also have to use the quotient or product rule.
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