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If |vec a + vec b|^(2) = |vec a|^(2) +|v...

If `|vec a + vec b|^(2) = |vec a|^(2) +|vec b|^(2)`, then

A

vec a is parallel to vec b

B

vec a is perpendicular to vec b

C

`vec a = vec b`

D

`|vec a + vec b| = |vec a| + |vec b|`

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The correct Answer is:
B
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