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Express the given vector vec(A) (shown g...

Express the given vector `vec(A)` (shown graphically ) in unit vector notation.

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(i) `vec(A)=3(cos 30hat(i)+sin 30hat(j))" "` (ii)`vec(A)=3(cos 30hat(i)-sin 30hat(j))` (iii)`vec(A)=3(-cos 30hat(i)-sin 30hat(j))`
`vec(A)=3(-cos 30hat(i)+sin 30hat(j))`
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