Convert 330 degrees to radians

some people remember a formula for this, but I find it difficult to remember them so I work most things out.

This is how I might do it - I am treating it as a ratio.  I know that there are pi radians in 180 degrees.

$$\begin{array}{rll} \frac{x}{330}&=&\frac{\pi}{180}\\\\ x&=&\frac{\pi\times 330}{180}\\\\ x&=&\frac{\pi\times 11}{6}\qquad \mbox{This is the exact number of radians}\\\\ \end{array}$$

$${\frac{{\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{330}}}{{\mathtt{180}}}} = {\mathtt{5.759\: \!586\: \!531\: \!581\: \!287\: \!6}}$$  

approx 5.76 radians

330° x (π/180°) = (11π)/6