Question

11. If vectors P,Q and R have magnitudes 5, 12 and 13 units
and P + O = R. The angle between Q and Ris -
has
(1) Cos
5
12
(2) COS
5
13
12
(3) Cos
(4) cos
2
13
13​

Answer 1

Answer:

∣P∣=5,∣Q∣=12 and ∣R∣=13

cosθ=RQ=1312

∴θ=cos−1(1312)

Explanation:

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