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If alpha in Q(4) and "sin" (alpha)/(2) +...

If `alpha in Q_(4) and "sin" (alpha)/(2) + "cos" (alpha)/(2) = (-1)/(2) "then sin 2" alpha =`

A

`(3 sqrt(7))/(8)`

B

`(3 sqrt(7))/(16)`

C

`(-3 sqrt(7))/(4)`

D

`(-3 sqrt(7))/(8)`

Text Solution

Verified by Experts

The correct Answer is:
D
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