cos(7x)+cos(x)-cos(4x)=0

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Solution for cos(7x)+cos(x)-cos(4x)=0 equation:


Simplifying
cos(7x) + cos(x) + -1cos(4x) = 0

Remove parenthesis around (7x)
cos * 7x + cos(x) + -1cos(4x) = 0

Reorder the terms for easier multiplication:
7cos * x + cos(x) + -1cos(4x) = 0

Multiply cos * x
7cosx + cos(x) + -1cos(4x) = 0

Multiply cos * x
7cosx + cosx + -1cos(4x) = 0

Remove parenthesis around (4x)
7cosx + cosx + -1cos * 4x = 0

Reorder the terms for easier multiplication:
7cosx + cosx + -1 * 4cos * x = 0

Multiply -1 * 4
7cosx + cosx + -4cos * x = 0

Multiply cos * x
7cosx + cosx + -4cosx = 0

Combine like terms: 7cosx + cosx = 8cosx
8cosx + -4cosx = 0

Combine like terms: 8cosx + -4cosx = 4cosx
4cosx = 0

Solving
4cosx = 0

Solving for variable 'c'.

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

Divide each side by '4'.
cosx = 0

Simplifying
cosx = 0

The solution to this equation could not be determined.

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