If ` vec a\ a n d\ vec b` are unit vectors, then which of the following values ` vec adot vec b` is not possible? `sqrt(3)` b. `sqrt(3)//2` c. `1//sqrt(2)` d. `-1//2`

Explanation

`|vec a| = |vec b| = 1`


`vec a * vec b = |vec a| |vec b| cos theta`

`=cos theta`

`therefore` correct option is `(a)`