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Find the angle between vec(a) and vec(b)...

Find the angle between `vec(a)` and `vec(b)`, when
(i) `|vec(a)|=2, |vec(b)|=1` and `vec(A).vec(B)=sqrt(3)` (ii) `|vec(a)|=|vec(b)|=sqrt(2)` and `vec(a).vec(b)=-1`.

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Verified by Experts

The correct Answer is:
(i) `pi/6` (ii) `(2pi)/3`
`cos theta =(vec(a).vec(b))/(|vec(a)||vec(b)|)`.
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RS AGGARWAL-SCALAR, OR DOT, PRODUCT OF VECTORS-Exercise 23
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