Question

If A×B=B×A, then the angle between A and B is

a) 180°
b) 90°
c) 60°
d) 45°

Give me correct answer..... ☺
if u give me wrong answer I will report your account......⚠️​

Answer 1

Question :

If A×B=B×A, then the angle between A and B is

Options :

a) 180°

b) 90°

c) 60°

d) 45°

Solution :

A×B = B×A

We know that A×B = ABsin@

we know that

Cross product is anti-commutative

A × B = - B × A

AB sin@ = BA sin( - @ )

sin@ = -sin@

2sin@ = 0

sin@ = 0

@ = 180

answer :@ = π option a

Answer 2

Answer:

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