y = (1+cos^2(7x)^3
i know the answer, but can anyone explain the steps of this to me, it would be much appreciated. some good practice for you wiz's out there. thanks alot.
ok, so you should have typed
so as you see, we have to do the chain rule a lot of times here.
the rule says,
so to differentiate a composite function, you differentiate the outer function as if the inside function was a single variable. then, to compensate for the fact that it really wasn't a single variable, you multiply by the derivative of the inside function.
so here goes: