Vector |OX x OY| = _____. (A) sin(P + Q) (B) sin2R

Question

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

Vector |OX x OY| = _____.

(A) sin(P + Q) 

(B) sin2R 

(C) sin(P + R) 

(D) sin(Q + R)  

Answer 1

Answer is (A) sin(P + Q)

The given geometrical situation is depicted in the following figure: