Part A

If vector vec$(A)$ has unity magnitude and makes an angle of $30$ with the $+x$ axis, then the $x$ and $y$ components of vec$(A)$ are

$A_x=\frac{1}{\sqrt[\phantom{2}]{2}},A_y=\frac{\sqrt[\phantom{2}]{3}}{\sqrt[\phantom{2}]{2}}$

$A_x=\frac{\sqrt[\phantom{2}]{3}}{\sqrt[\phantom{2}]{2}},A_y=\frac{1}{\sqrt[\phantom{2}]{2}}.$

$A_x=\frac{1}{2},A_y=\frac{\sqrt[\phantom{2}]{3}}{2}.$

$A_x=\frac{\sqrt[\phantom{2}]{3}}{2},A_y=\frac{1}{2}.$

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