Which of the following pairs of vectors are perpendicular to each other?

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

Problem

Which of the following pairs of vectors are perpendicular to each other? (a)

(1,1,1)

and

(1,1,1)

(b)

(1,2,-1)

and

(2,-1,0)

(c)

(1,1,2)

and

(2,-1,0)

(d)

(0,1,2)

and

(2,1,0)