Let and . If the angle between and is , the value of…

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

Problem

Let

\mathbf{a}=\langle t,1,3\rangle

and

\mathbf{b}=\langle 2,-1,t\rangle

. If the angle between

\mathbf{a}

and

\mathbf{b}

90^{\circ}

, the value of

t

is (a)

-\dfrac{1}{5}

(b)

0

(c)

\dfrac{1}{5}

(d)

\dfrac{1}{3}