If hat u and hat v are unit vect...

If ` hat u` and ` hat v` are unit vectors and `theta` is the acute angle between them, then `2 hat uxx3 hat v` is a unit vector for (1) exactly two values of `theta` (2) more than two values of `theta` (3) no value of `theta` (4) exactly one value of `theta`

A

exactly two values of `theta`

B

more than two value of `theta`

C

no value of `theta`

D

Exactly one value of `theta`

Text Solution

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The correct Answer is:

D

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