Question 865399
sin^2(x) + sin(x) = 0



sin(x)( sin(x) + 1 ) = 0



sin(x) = 0 or  sin(x) + 1 = 0



sin(x) = 0 or  sin(x) = -1



x = arcsin(0) or  x = arcsin(-1)



x = 0,pi or  x = 3pi/2



The three solutions are x = 0, x = pi, x = 3pi/2