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If vec a and vec b are vectors such that...

If `vec a` and `vec b` are vectors such that `|vec a + vec b| = |vec a - vec b|`, then the angle between `vec a` and `vec b` is

A

`120^(@)`

B

`60^(@)`

C

`90^(@)`

D

`30^(@)`

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The correct Answer is:
C
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