Question: Evaluate the derivative using properties of logarithms where needed. d/dx (9^cosx) a.-sin x 9^cosx b. -sinx 9^cos x-1 c. -ln 9 sin x 9^cosx d.
Evaluate the derivative using properties of logarithms where needed.
d/dx (9^cosx)
a.-sin x 9^cosx
b. -sinx 9^cos x-1
c. -ln 9 sin x 9^cosx
d. -ln 9 sin x 9^cosx-1
(please include a few key steps)
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