Cos^2x+2cos+1=0

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Solution for Cos^2x+2cos+1=0 equation: 


Simplifying
Cos2x + 2cos + 1 = 0

Reorder the terms:
1 + 2cos + os2xC = 0

Solving
1 + 2cos + os2xC = 0

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + 2cos + -1 + os2xC = 0 + -1

Reorder the terms:
1 + -1 + 2cos + os2xC = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 2cos + os2xC = 0 + -1
2cos + os2xC = 0 + -1

Combine like terms: 0 + -1 = -1
2cos + os2xC = -1

Add '-1os2xC' to each side of the equation.
2cos + os2xC + -1os2xC = -1 + -1os2xC

Combine like terms: os2xC + -1os2xC = 0
2cos + 0 = -1 + -1os2xC
2cos = -1 + -1os2xC

Divide each side by '2os'.
c = -0.5o-1s-1 + -0.5sxC

Simplifying
c = -0.5o-1s-1 + -0.5sxC

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