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The angles of a triangle , two of whose ...

The angles of a triangle , two of whose sides are respresented by vectors `sqrt3 (hata xx vecb) and hatb - ( hata . Vecb)hata` where `vecb` is a non - zero vector and `veca` is a unit vector in the direction of `veca`. Are

A

`pi/2, pi/3` and `pi/6`

B

`pi/2, pi/4` and `pi/4`

C

`pi/3, pi/3` and `pi/3`

D

Data insufficient

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The correct Answer is:
A
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