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What can be the angle between (vec(P) + ...

What can be the angle between `(vec(P) + vec(Q))` and `(vec(P) - vec(Q))` ?

A

zero

B

`tan^(-1) (P//Q)`

C

`tan^(-1) (Q//P)`

D

`tan^(-1) (P- Q)//(P+ Q)`

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Verified by Experts

The correct Answer is:
A
Resultant of `vec(P) + vec(Q) and vec(P)- vec(Q)= vec(P) + vec(Q) + vec(P)- vec(Q)= 2vec(P)` angle between `vec(P) and 2 vec(P)` is zero
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