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

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

User Marc Scheib
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Find all solutions to the equation. cos^2x + 2 cos x + 1 = 0-example-1
User Tendero
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