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If costheta=3//7,and theta lies in the f...

If `costheta=3//7,and theta` lies in the fourth quadrant, evaluate : `sin(theta//2),cos(theta//2),tan(theta//2).`

A

`sqrt((2//7))`

B

`-sqrt((2//5))`

C

`-sqrt((5//7))`

D

none of these

Text Solution

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The correct Answer is:
C
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