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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

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detailed solution

Correct option is C

|P→| = 5, |Q→| = 12 and |R→| = 13cos θ = QR = 1213∴ θ = cos−11213

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If vectors P, Q and R have magnitude 5, 12 and 13 units and P→+Q→ = R→, the angle between Q and R is

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Ready to Test Your Skills?

free study material

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