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If sin alpha=-3/6, alpha in [0,2pi] then...

If `sin alpha=-3/6, alpha in [0,2pi]` then the possible values of `cos (alpha/2)`, is/are

A

`1/sqrt(10)`

B

`-1/sqrt(10)`

C

`3/sqrt(10)`

D

`-3/sqrt(10)`

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The correct Answer is:
B, D
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AAKASH INSTITUTE-TRIGNOMETRIC FUNCTIONS -Section-C (Objective Type Questions More than one options are correct )
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