cos(3x)*cos(x)=cos(x)

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Solution for cos(3x)*cos(x)=cos(x) equation:


Simplifying
cos(3x) * cos(x) = cos(x)

Remove parenthesis around (3x)
cos * 3x * cos(x) = cos(x)

Reorder the terms for easier multiplication:
3cos * x * cos * x = cos(x)

Multiply cos * x
3cosx * cos * x = cos(x)

Multiply cosx * cos
3c2o2s2x * x = cos(x)

Multiply c2o2s2x * x
3c2o2s2x2 = cos(x)

Multiply cos * x
3c2o2s2x2 = cosx

Solving
3c2o2s2x2 = cosx

Solving for variable 'c'.

Reorder the terms:
-1cosx + 3c2o2s2x2 = cosx + -1cosx

Combine like terms: cosx + -1cosx = 0
-1cosx + 3c2o2s2x2 = 0

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

Subproblem 1

Set the factor 'cosx' equal to zero and attempt to solve: Simplifying cosx = 0 Solving cosx = 0 Move all terms containing c to the left, all other terms to the right. Simplifying cosx = 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 '(-1 + 3cosx)' equal to zero and attempt to solve: Simplifying -1 + 3cosx = 0 Solving -1 + 3cosx = 0 Move all terms containing c to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 3cosx = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 3cosx = 0 + 1 3cosx = 0 + 1 Combine like terms: 0 + 1 = 1 3cosx = 1 Divide each side by '3osx'. c = 0.3333333333o-1s-1x-1 Simplifying c = 0.3333333333o-1s-1x-1

Solution

c = {0.3333333333o-1s-1x-1}

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