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

If `1 + cos x =k,` where x is acute, then `sin "" (x)/(2) is : `a)`sqrt ((1- k )/( 2))` b)`sqrt ( 2- k)` c)`sqrt ((2 + k)/( 2))` d)`sqrt ((2- k )/(2))`

A

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

B

`sqrt ( 2- k)`

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
D
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