To convert from degees to radians, multiply the degree measure by pi/180. So we have...

330 x pi/180 = 11pi/6 rads

And that's it......

$$\left({\frac{{\mathtt{330}}}{{\mathtt{180}}}}\right){\mathtt{\,\times\,}}{\mathtt{3.14}} = {\frac{{\mathtt{1\,727}}}{{\mathtt{300}}}} = {\mathtt{5.756\: \!666\: \!666\: \!666\: \!666\: \!7}}$$ RADIANS