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If |vec(a)| = 2, |vec(b)|= 7 and (vec(a)...

If `|vec(a)| = 2, |vec(b)|= 7 and (vec(a) xx vec(b))=(3 hat(i) + 2 hat(j) + 6 hat(k)), " find the angle between " vec(a) and vec(b).`

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SL ARORA-Motion in a Plane-Excercise
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