Question 301219: please help me solve : 2sin^2x + sinx -3 = 0
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! please help me solve : 2sin^2x + sinx -3 = 0
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It's a quadratic in sin(x)
(2sin + 3)*(sin - 1) = 0
sin = -3/2 (not a real number)
sin = 1 --> x = 90 + 360n degrees, n = 0,1,2,3...
or x = pi/2 + 2n*pi, n = 0,1,2,3... in radians
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