Let be the origin and be three unit vectors in the directions of the sides

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

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

\Delta PQR

|\vec{OX} \times \vec{OY}| =

(1)

-\frac{3}{2}

(2)

\frac{3}{2}

(3)

\frac{5}{3}

(4)

-\frac{5}{3}