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Find angle theta between the vectors vec...

Find angle `theta` between the vectors `veca=hati+hatj-hatkandvecb=hati-hatj+hatk`.

A

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

B

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

C

`- sin^(-1) ""(2 sqrt(2))/( 3)`

D

`sin^(-1) ""(1)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
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