1. The problem statement, all variables and given/known data Sketch the curve of y=sin(x)+sin(2x) I got all the derivatives, and the roots N(k*∏|0), but now I'm stuck with the maxima/minima 2. Relevant equations First derivative y'=cos(x)+2cos(2x) 3. The attempt at a solution I set cos(x)+2cos(2x)=0 but now I'm stuck. I just don't know how to solve this oO Graph-plotters and the solution book spit out -2,57 -0,94 and so on, but how do I get this solution?