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If a vector vecr is equall inclined with...

If a vector `vecr` is equall inclined with the vectors `veca=costhetahati+sinthetahatj, vecb=-sinthetahati+costhetahatj` and `vecc=hatk`, then the angle between `vecr` and `veca` is

A

`cos^(-1)((1)/(sqrt2))`

B

`cos^(-1)((1)/(3))`

C

`cos^(-1)((1)/(sqrt3))`

D

`cos^(-1).(1)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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