You can put this solution on YOUR website! sin^2x * cosx - 1 = 0
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(1-cos^2)(cos) = 1
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-cos^3+cos-1 = 0
cos^3-cos+1 = 0
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That doesn't lead to anything interesting.
Are you sure you posted the problem
correctly?
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cos(2x)-3sinx = 2
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1-2sin^2 -3sin = 2
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2sin^2+3sin+1 = 0
Factor:
(2sin+1)(sin+1) = 0
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sin(x) = -1/2 or sin(x) = -1
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x = 330 degrees or 210 degrees or 270 degrees
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Cheers,
Stan H.
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