So i understand trig graphs until it involves $\displaystyle \pi$ FOR INORMATION - where i have put < i mean equal to or less the ni just dont know how to math it on here. thanks in advance

sketch the graph of

$\displaystyle y=sinX$ $\displaystyle for 0 < X < 2\pi$

solve the equation $\displaystyle 2sinX = -1$ for $\displaystyle 0 < X < 2\pi$

give your answers in the form $\displaystyle k\pi$