Cos(x)+cos(2x)+cos(3x)+cos(4x)+cos(5x)+cos(6x)+cos(7x)=0

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Solution for Cos(x)+cos(2x)+cos(3x)+cos(4x)+cos(5x)+cos(6x)+cos(7x)=0 equation:


Simplifying
Cos(x) + cos(2x) + cos(3x) + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Multiply osC * x
osxC + cos(2x) + cos(3x) + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Remove parenthesis around (2x)
osxC + cos * 2x + cos(3x) + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Reorder the terms for easier multiplication:
osxC + 2cos * x + cos(3x) + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Multiply cos * x
osxC + 2cosx + cos(3x) + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Remove parenthesis around (3x)
osxC + 2cosx + cos * 3x + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Reorder the terms for easier multiplication:
osxC + 2cosx + 3cos * x + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Multiply cos * x
osxC + 2cosx + 3cosx + cos(4x) + cos(5x) + cos(6x) + cos(7x) = 0

Remove parenthesis around (4x)
osxC + 2cosx + 3cosx + cos * 4x + cos(5x) + cos(6x) + cos(7x) = 0

Reorder the terms for easier multiplication:
osxC + 2cosx + 3cosx + 4cos * x + cos(5x) + cos(6x) + cos(7x) = 0

Multiply cos * x
osxC + 2cosx + 3cosx + 4cosx + cos(5x) + cos(6x) + cos(7x) = 0

Remove parenthesis around (5x)
osxC + 2cosx + 3cosx + 4cosx + cos * 5x + cos(6x) + cos(7x) = 0

Reorder the terms for easier multiplication:
osxC + 2cosx + 3cosx + 4cosx + 5cos * x + cos(6x) + cos(7x) = 0

Multiply cos * x
osxC + 2cosx + 3cosx + 4cosx + 5cosx + cos(6x) + cos(7x) = 0

Remove parenthesis around (6x)
osxC + 2cosx + 3cosx + 4cosx + 5cosx + cos * 6x + cos(7x) = 0

Reorder the terms for easier multiplication:
osxC + 2cosx + 3cosx + 4cosx + 5cosx + 6cos * x + cos(7x) = 0

Multiply cos * x
osxC + 2cosx + 3cosx + 4cosx + 5cosx + 6cosx + cos(7x) = 0

Remove parenthesis around (7x)
osxC + 2cosx + 3cosx + 4cosx + 5cosx + 6cosx + cos * 7x = 0

Reorder the terms for easier multiplication:
osxC + 2cosx + 3cosx + 4cosx + 5cosx + 6cosx + 7cos * x = 0

Multiply cos * x
osxC + 2cosx + 3cosx + 4cosx + 5cosx + 6cosx + 7cosx = 0

Reorder the terms:
2cosx + 3cosx + 4cosx + 5cosx + 6cosx + 7cosx + osxC = 0

Combine like terms: 2cosx + 3cosx = 5cosx
5cosx + 4cosx + 5cosx + 6cosx + 7cosx + osxC = 0

Combine like terms: 5cosx + 4cosx = 9cosx
9cosx + 5cosx + 6cosx + 7cosx + osxC = 0

Combine like terms: 9cosx + 5cosx = 14cosx
14cosx + 6cosx + 7cosx + osxC = 0

Combine like terms: 14cosx + 6cosx = 20cosx
20cosx + 7cosx + osxC = 0

Combine like terms: 20cosx + 7cosx = 27cosx
27cosx + osxC = 0

Solving
27cosx + osxC = 0

Solving for variable 'c'.

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

Add '-1osxC' to each side of the equation.
27cosx + osxC + -1osxC = 0 + -1osxC

Combine like terms: osxC + -1osxC = 0
27cosx + 0 = 0 + -1osxC
27cosx = 0 + -1osxC
Remove the zero:
27cosx = -1osxC

Divide each side by '27osx'.
c = -0.03703703704C

Simplifying
c = -0.03703703704C

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