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OpenStudy (anonymous):
Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5 Please help!!
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OpenStudy (p0sitr0n):
take y=sinx then the equation is 7y^2-14y+7=0 Solve the quadratic then, come back to y=sinx and solve for x
OpenStudy (anonymous):
so i would solve the equation and i would get 7y^2 -14y=-7?
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