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Let vec(P)=2hat(i)+hat(j)-2hat(k) and ve...

Let `vec(P)=2hat(i)+hat(j)-2hat(k)` and `vec(Q)=4hat(i)-3hat(k)`. Find the acute angle between `vec(P)` and `vec(Q)`.

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The correct Answer is:
`theta=cos^(-1) 14/15`
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