Here's the question you clicked on:
jayblue37
derivative of ln (Arccos (x^3))
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You still need to find the derivative of arccos (x^3) Baldymcgee6. And off the top of my head all I can think is something like -1/(1+x^2) but certainly don't go by that. This is just a chain rule problem. Do the ln part first and then multiply it by the derivative of the inside, the arccos section.
@malical i did that on purpose... He should have the capabilities of finding the derivative of cos^-1(x) via google.. I don't want to give away the whole answer :)