Solve differential equation and sketch the solution curves:

General solution:

are suppressed solutions

> restart;

> with(plots):

> f:={seq(exp(x)*sin(y)^2+y*cos(y)- sin(y)=c/2,c=-10..10),y=Pi,y=2*Pi,y=-Pi,y=-2*Pi}:

> implicitplot(f,x=-3..4,y=-2*Pi..2*Pi,numpoints=5000);