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If abs(vec v1+vec v2)=abs(vec v1- vec v2...

If `abs(vec v_1+vec v_2)=abs(vec v_1- vec v_2)` and `vec v_2` is finite thus

A

`vec v_1` is parallel to `vec v_2`

B

`vec v_1=vec v _2`

C

`abs (vec v_1)=abs (vec v_2)`

D

`vec v_1 bot er to `vec v _2`

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Verified by Experts

The correct Answer is:
D
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