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If z=cos(pi/4)+isin(pi/6) , then a. |z|=...

If `z=cos(pi/4)+isin(pi/6)` , then a. `|z|=1, arg(z)=\ pi/4` b. `|z|=1, arg(z)=\ pi/6` c. `|z|=(sqrt(3))/2, arg(z)=(5pi)/(24)` d. `|z|=(sqrt(3))/2, arg(z)=tan^(-1)(1/sqrt(2))`

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