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Prove that the function f given by f(x) ...

Prove that the function f given by `f(x) = log |cosx| is decreasing on (0,pi/2)` and increasing on `(3pi/2, 2pi)`

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PSEB-APPLICATION OF DERIVATIVES-Exercise
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  3. Prove that the function f given by f(x) = log |cosx| is decreasing on ...

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