1.

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|=

Answer»

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|=



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