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If sin alpha = (-3)/(5), where pi lt al...

If `sin alpha = (-3)/(5), ` where `pi lt alpha lt (3pi)/(2), ` then ` cos ((alpha)/(2))=` ................ A) `(-1)/( sqrt10)` B) `(1)/(sqrt10)` C) `(3)/(sqrt10)` D) `(-3)/(sqrt10)`

A

`(-1)/( sqrt10)`

B

`(1)/(sqrt10)`

C

`(3)/(sqrt10)`

D

`(-3)/(sqrt10)`

Text Solution

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The correct Answer is:
A
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