Q.

If f(x) =| cos x1012cosx1012cosx | then∫0π/2f(x)  dx=

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a

12

b

−12

c

−13

d

13

answer is C.

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Detailed Solution

f(x)=|Cos x1012Cos x1012Cos x| ∫0π/2Cos 3x dx=(Sin 3x3)0π/2                         =−13
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If f(x) =| cos x1012cosx1012cosx | then∫0π/2f(x)  dx=