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Let hat(a), hat(b) be two unit vectors ...

Let `hat(a), hat(b) ` be two unit vectors and `theta` be the angle between them.
What is `cos ((theta)/(2))` equal to ?

A

`(|a-b|)/(2)`

B

`(|a+b|)/(2)`

C

`(|a|-|b|)/(2)`

D

`(|a|+|b|)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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