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Let vec a and vec b be two non collinear...

Let `vec a` and `vec b` be two non collinear unit vectors. If `vec u = vec a - (vec a . vec b) vec b` and `vec nu = vec a xx vec b`, then `|vec nu| =`

A

`|vec u|`

B

`|vec u| + |vec nu . vec a|`

C

`2|vec nu|`

D

`|vec u|+vec u.(vec a + vec b)`

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The correct Answer is:
A
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