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If vector P, Q and R have magnitude 5,12...

If vector `P, Q and R` have magnitude 5,12,and 13 units and `vec(P)+vec(Q)=vec(R )`, the angle between Q and R is

A

`cos^(-1)((5)/(12))`

B

`cos^(-1)((5)/(13))`

C

`cos^(-1)((12)/(13))`

D

`cos^(-1)((7)/(13))`

Text Solution

Verified by Experts

The correct Answer is:
C

`costheta=(Q)/(R)`
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