Question

If A x B = Bx A, then the angle between A and B is (a) π (b) π/3 (c) π/2 (d) π/4

Answer 1

pie is your answer...

Answer 2

Answer:

a) pi

Explanation:

A x B = B x A

A x B - B x A = 0

A x B + A x B = 0 (A x B = - (B x A))

2AB sinϑ = 0

sinϑ = 0 ( |A| not equal to 0 |||ly also |B|)

ϑ = 0 / ϑ = pi

So your answer is ϑ = pi