If vectors \( P, Q \) and \( R \) have magnitude 5,12 and 13 units and \( \vec{P}+\vec{Q}=\vec{R....

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Question If vectors \( P, Q \) and \( R \) have magnitude 5,12 and 13 units and \( \vec{P}+\vec{Q}=\vec{R} \), the angle between \( Q \) and \( R \) is
(A) \( \cos ^{-1} \frac{5}{12} \)
(B) \( \cos ^{-1} \frac{5}{13} \)
(C) \( \cos ^{-1} \frac{12}{13} \)
(D) \( \cos ^{-1} \frac{7}{13} \)šŸ“²PW App Link - https://bit.ly/YTAI_PWAP šŸŒPW Website - https://www.pw.live



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