cos(3x)=cos(42)

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Solution for cos(3x)=cos(42) equation:


Simplifying
cos(3x) = cos(42)

Remove parenthesis around (3x)
cos * 3x = cos(42)

Reorder the terms for easier multiplication:
3cos * x = cos(42)

Multiply cos * x
3cosx = cos(42)

Reorder the terms for easier multiplication:
3cosx = 42cos

Solving
3cosx = 42cos

Solving for variable 'c'.

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

Add '-42cos' to each side of the equation.
-42cos + 3cosx = 42cos + -42cos

Combine like terms: 42cos + -42cos = 0
-42cos + 3cosx = 0

Factor out the Greatest Common Factor (GCF), '3cos'.
3cos(-14 + x) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'cos' equal to zero and attempt to solve: Simplifying cos = 0 Solving cos = 0 Move all terms containing c to the left, all other terms to the right. Simplifying cos = 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 '(-14 + x)' equal to zero and attempt to solve: Simplifying -14 + x = 0 Solving -14 + x = 0 Move all terms containing c to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + x = 0 + 14 Combine like terms: -14 + 14 = 0 0 + x = 0 + 14 x = 0 + 14 Combine like terms: 0 + 14 = 14 x = 14 Add '-1x' to each side of the equation. x + -1x = 14 + -1x Combine like terms: x + -1x = 0 0 = 14 + -1x Simplifying 0 = 14 + -1x 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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