6cos^2(x)-4=cos(2x)

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Solution for 6cos^2(x)-4=cos(2x) equation:


Simplifying
6cos2(x) + -4 = cos(2x)

Multiply cos2 * x
6cos2x + -4 = cos(2x)

Reorder the terms:
-4 + 6cos2x = cos(2x)

Remove parenthesis around (2x)
-4 + 6cos2x = cos * 2x

Reorder the terms for easier multiplication:
-4 + 6cos2x = 2cos * x

Multiply cos * x
-4 + 6cos2x = 2cosx

Solving
-4 + 6cos2x = 2cosx

Solving for variable 'c'.

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

Add '-2cosx' to each side of the equation.
-4 + -2cosx + 6cos2x = 2cosx + -2cosx

Combine like terms: 2cosx + -2cosx = 0
-4 + -2cosx + 6cos2x = 0

Add '4' to each side of the equation.
-4 + -2cosx + 4 + 6cos2x = 0 + 4

Reorder the terms:
-4 + 4 + -2cosx + 6cos2x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -2cosx + 6cos2x = 0 + 4
-2cosx + 6cos2x = 0 + 4

Combine like terms: 0 + 4 = 4
-2cosx + 6cos2x = 4

Reorder the terms:
-4 + -2cosx + 6cos2x = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -2cosx + 6cos2x = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-2 + -1cosx + 3cos2x) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-2 + -1cosx + 3cos2x)' equal to zero and attempt to solve: Simplifying -2 + -1cosx + 3cos2x = 0 Solving -2 + -1cosx + 3cos2x = 0 Move all terms containing c to the left, all other terms to the right. Add '2' to each side of the equation. -2 + -1cosx + 2 + 3cos2x = 0 + 2 Reorder the terms: -2 + 2 + -1cosx + 3cos2x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1cosx + 3cos2x = 0 + 2 -1cosx + 3cos2x = 0 + 2 Combine like terms: 0 + 2 = 2 -1cosx + 3cos2x = 2 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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