Cos*3x+cosx=0

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Solution for Cos*3x+cosx=0 equation:


Simplifying
Cos * 3x + cosx = 0

Reorder the terms for easier multiplication:
3osC * x + cosx = 0

Multiply osC * x
3osxC + cosx = 0

Reorder the terms:
cosx + 3osxC = 0

Solving
cosx + 3osxC = 0

Solving for variable 'c'.

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

Add '-3osxC' to each side of the equation.
cosx + 3osxC + -3osxC = 0 + -3osxC

Combine like terms: 3osxC + -3osxC = 0
cosx + 0 = 0 + -3osxC
cosx = 0 + -3osxC
Remove the zero:
cosx = -3osxC

Divide each side by 'osx'.
c = -3C

Simplifying
c = -3C

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