# cos(x)-cos(3x)=0

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## Solution for cos(x)-cos(3x)=0 equation:

Simplifying
cos(x) + -1cos(3x) = 0
Multiply cos * x
cosx + -1cos(3x) = 0
Remove parenthesis around (3x)
cosx + -1cos * 3x = 0
Reorder the terms for easier multiplication:
cosx + -1 * 3cos * x = 0
Multiply -1 * 3
cosx + -3cos * x = 0
Multiply cos * x
cosx + -3cosx = 0
Combine like terms: cosx + -3cosx = -2cosx
-2cosx = 0
Solving
-2cosx = 0
Solving for variable 'c'.
Move all terms containing c to the left, all other terms to the right.
Divide each side by '-2'.
cosx = 0
Simplifying
cosx = 0
The solution to this equation could not be determined.`