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If 1 + cos x=k where x is acute , t...

If ` 1 + cos x=k` where x is acute , then sin ` x/2`

A

`sqrt(1-k)/(2)`

B

`sqrt(2-K)`

C

`sqrt((2+k)/( 2))`

D

`sqrt((2-k)/(2))`

Text Solution

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The correct Answer is:
D
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