SOLUTION: Find all solutions to the equation. cos^2x + 2 cos x + 1 = 0

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Question 1017098: Find all solutions to the equation.
cos^2x + 2 cos x + 1 = 0
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find all solutions to the equation.
cos^2x + 2 cos x + 1 = 0
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Factor::
(cos(x)+1)^2 = 0
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cos(x) = -1
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x = 180 degrees or pi radians
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Cheers,
Stan H.
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