What is the dot product of two perpendicular vectors?

(A)  1

(B)  0

(C)  -1

(D)  1/2

(✓)  0

When two vectors are perpendicular to each other, then θ = 90° and Cos 90° = θ . Therefore, A.B = A x B x Cos θ = A x B x Cos 90° = θ When two vectors are parallel to each other, then θ = θ ° and Cos θ ° = 1. Therefore, A.B = A x B x Cos θ = A x B x Cos θ ° = AB When two vectors are anti-parallel to each other, then θ =180° and Cos 180° = -1. Therefore, A.B = A x B x Cos θ = A x B x Cos 180° = -AB

International Youth Day is observed on which day?

(A)  12 July

(B)  12 August

(C)  12 September

(D)  11 September

(✓)  12 August

Read Important Days article