Express point P whose rectangular coord...

Express point P whose rectangular coordinates are `(3,3sqrt(3))` in terms of polar coordinates
`r^(2)=x^(2)+y^(2)=9+27=36`
` r=6`
`r cos theta =x`
`cos theta =3/6 =1/2`
Therefore `theta =60^(@)` and `(6,60^(@))` are the polar coordinates of P

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