Convert the point (x,y,z)=(2,4,1)\displaystyle {\left({x},{y},{z}\right)}={\left({2},{4},{1}\right)} to cylindrical coordinates. Give answers either as expressions, or decimals to at least one decimal place, with positive values for θ\displaystyle \theta and r.
(r,θ,z)=\displaystyle {\left({r},\theta,{z}\right)}=