Question 756976
2sin^2x + 7sinx - 4 = 0
would factor to:-
(2sinx - 1)(sinx + 4)= 0
Therefore sin (x) = 1/2 
               x = 30 degrees, 150 degrees
               x = pi/6 , 5pi/6

            OR

              sin (x) = -4 (No answer)
Hope this helps.
:-)