Let and . Which one of the following describes the relation between and…

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

Problem

Let

\mathbf{u}=2\hat i-\hat j+3\hat k

and

\mathbf{v}=4\hat i-2\hat j+6\hat k

. Which one of the following describes the relation between

\mathbf{u}

and

\mathbf{v}

? (a)

\mathbf{u}

and

\mathbf{v}

are perpendicular

(90^{\circ})

. (b) The angle between

\mathbf{u}

and

\mathbf{v}

60^{\circ}

(acute but non-zero). (c)

\mathbf{u}

and

\mathbf{v}

are parallel

(0^{\circ})

. (d)

\mathbf{u}

and

\mathbf{v}

are anti-parallel

(180^{\circ})