cos^4(2x)-cos^2(4x)=0

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Solution for cos^4(2x)-cos^2(4x)=0 equation:


Simplifying
cos4(2x) + -1cos2(4x) = 0

Remove parenthesis around (2x)
cos4 * 2x + -1cos2(4x) = 0

Reorder the terms for easier multiplication:
2cos4 * x + -1cos2(4x) = 0

Multiply cos4 * x
2cos4x + -1cos2(4x) = 0

Remove parenthesis around (4x)
2cos4x + -1cos2 * 4x = 0

Reorder the terms for easier multiplication:
2cos4x + -1 * 4cos2 * x = 0

Multiply -1 * 4
2cos4x + -4cos2 * x = 0

Multiply cos2 * x
2cos4x + -4cos2x = 0

Reorder the terms:
-4cos2x + 2cos4x = 0

Solving
-4cos2x + 2cos4x = 0

Solving for variable 'c'.

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

Factor out the Greatest Common Factor (GCF), '2cos2x'.
2cos2x(-2 + s2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor 'cos2x' equal to zero and attempt to solve: Simplifying cos2x = 0 Solving cos2x = 0 Move all terms containing c to the left, all other terms to the right. Simplifying cos2x = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(-2 + s2)' equal to zero and attempt to solve: Simplifying -2 + s2 = 0 Solving -2 + s2 = 0 Move all terms containing c to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + s2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + s2 = 0 + 2 s2 = 0 + 2 Combine like terms: 0 + 2 = 2 s2 = 2 Add '-1s2' to each side of the equation. s2 + -1s2 = 2 + -1s2 Combine like terms: s2 + -1s2 = 0 0 = 2 + -1s2 Simplifying 0 = 2 + -1s2 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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