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The value of alpha in (-pi, 0) satisfyi...

The value of `alpha in (-pi, 0)` satisfying `sin alpha+underset(alpha)overset(2alpha)int cos2 x dx=0`, is

A

`- pi//2`

B

`-pi`

C

`- pi//3`

D

`- pi//4`

Text Solution

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The correct Answer is:
C
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