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If sin theta=-(4)/(5) and theta lies in ...

If `sin theta=-(4)/(5)` and `theta` lies in 3 quadrant then the value of `cos ((theta)/(2))` is

A

`(1)/(5)`

B

`-(1)/(sqrt(10))`

C

`-(1)/(sqrt(5))`

D

`(1)/(sqrt(10))`

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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