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OpenStudy (anonymous):
if f(x)=cos^3(4x) then f'(x)=?
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OpenStudy (tkhunny):
You have some chain rule in your future. Give it a go!
OpenStudy (anonymous):
(cos^3)d/dx(4x) + (4x) d/dx cos^3
OpenStudy (anonymous):
is that right?
OpenStudy (tkhunny):
?? There is no multiplication. \(f(x)=cos^{3}(4x)\) \(f'(x) = 3\cdot\cos^{2}(4x)\cdot (SOMETHING) \cdot (SOMETHING \; ELSE)\) Fill in the blanks.
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