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The orthogonal projection of vec a\ on\...

The orthogonal projection of ` vec a\ on\ vec b` is `(( vec adot vec b) vec a)/(|"a"|^2)` b. `(( vec adot vec b) vec b)/(| vec b|^2)` c. ` vec a/(| vec a|)` d. ` vec b/(| vec b|)`

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Correct option is `(b) frac{(vec{a} cdot vec{b}) vec{b}}{|vec{b}|^{2}}`
The orthogonal projection of `vec{a}` on `vec{b}` is `frac{(vec{a} cdot vec{b}) vec{b}}{|vec{b}|^{2}}`
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