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Q.

Evaluate ∫−π/2π/2 log⁡a−sin⁡θa+sin⁡θdθ,a>0.

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a

0

b

2

c

3

d

4

answer is A.

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Detailed Solution

f(θ)=log⁡a−sin⁡θa+sin⁡θf(−θ)=log⁡a+sin⁡θa−sin⁡θ=−log⁡a−sin⁡θa+sin⁡θ=−f(θ)since  the integrand is an odd function the given integral is zero.
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