Question 1073767
7 sin^2 x - 14 sin x + 2 = -5 
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subtract 2 from both sides of =
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7 sin^2 x - 14 sin x = -7
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divide both sides of = by 7
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sin^2 x - 2 sin x = -1
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sin^2 x - 2 sin x + 1 = 0
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factor the quadratic
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(sin x - 1)^2 = 0
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sin x = 1
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x = 90 + ( 2 * 180 * n) where n belongs to the integers(Z)
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