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The function f whose graph passes through (π/4,0)

and whose derivative is log(tanx)sinxcosx is given by 

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a
(log⁡tan⁡x)2+π4
b
12(log⁡cos⁡x)2
c
12(log⁡sin⁡x)2
d
12(log⁡tan⁡x)2

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detailed solution

Correct option is D

f(x)=∫log⁡(tan⁡x)sin⁡xcos⁡x=12(log⁡tan⁡x)2+C0=fπ4=12(log⁡1)2+C⇒C=0


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