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Let vec(a) and vec(b) be two unit vector...

Let `vec(a)` and `vec(b)` be two unit vectors and `theta` is the angle between them. Then `vec(a)+vec(b)` is a unit vector if :

A

`theta=pi/4`

B

`theta=pi/3`

C

`theta=pi/2`

D

`theta=(2pi)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
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