Q.

Minimum value of (Sinx)Sinx is
 

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a

1

b

1e

c

e-1e

d

e1e

answer is C.

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Detailed Solution

fx=sin xsin x log fx=sin x log sin x 1fxf1x=sin x.1sin xcos x+log sin x.cos x f1xfx=cos x+cos x log sin x fx is min or max

f1x=0 cosx1+log sin x=0 cos x=0      log sin x=-1 x=π/2       sin x=e-1

fπ/2=11=1 f1e=e-1e-1=e-1/e min value =e-1/e

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