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If the points O (0,0), A(cos alpha, sin ...

If the points O (0,0), `A(cos alpha, sin alpha), B(cos beta, sin beta)` are the vertices of a right-angled triangle, then `|sinfrac((alpha-beta))(2)|`=

A

`1/2`

B

`1/sqrt2`

C

`1/sqrt3`

D

None of these

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The correct Answer is:
B
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