Question

if vector P,Q and R have magnitudes 5,12 and 13 units and P +Q=R .find the angle between Q and R of physics clasd 11th
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Answer 1

Answer:

∣P→∣∣∣=5,∣∣∣Q→∣∣∣=12and∣∣∣R→∣∣∣=13  

cosθ=QR=1213

θ=cos−1(1213)

Explanation: