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Question

Let O be the origin and OX, OY, OZ be three unit vectors in the directions of the sides QR, RP, PQ respectively, of a triangle PQR.
|OX×OY|=


A

sin (P+Q)

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B

sin (Q + R)

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C

sin (P + R)

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D

sin 2R

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Solution

The correct option is A

sin (P+Q)


sin R=sin(P+Q)


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