You are suggested to go through MATLAB Onramp-
Seems like homework, still I have answered. It doesn't make sense without knowing how it works.
syms x
eq=3*sin(150+x)-sin(150-x)==0;
x=vpa(solve(eq,x))
Must check the function of solve and vpa, what does symbolic variable represents?
The Matlab Help function and the online Matlab documentation are very useful for brushing up on MATLAB.
