Question 502791
2sin^2(x)+ 5sin( x )-3 = 0
(2sinx-1)(sinx+3)=0
(sinx+3)=0
sinx=-3 (reject, -1 ≤ sinx ≤ 1)
2sinx-1=0
sin x=1/2
x=π/6  (for x between 0 and π/2)