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(i) Find the projection of vec(a) on vec...

(i) Find the projection of `vec(a)` on `vec(b)` if `vec(a).vec(b)=8` and `vec(b)=(2hat(i)+6hat(j)+3hat(k))`.
(ii) Write the projection of the vector `(hat(i)+at(j))` on the vector `(hat(i)-hat(j))`.

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