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OpenStudy (anonymous):
Find the derivative of f(x)=cosx-2tanx.
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OpenStudy (anonymous):
\[f'(x) = -\sin(x) - 2\sec(x)^2\]
OpenStudy (anonymous):
\[f′(x)=−\sin(x)−2 \sec^2(x)\] is better
OpenStudy (anonymous):
Uggly latex rendering.
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