Cos(5x)+cos(7x)+cos(5x)=cos(7x)

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Solution for Cos(5x)+cos(7x)+cos(5x)=cos(7x) equation:


Simplifying
Cos(5x) + cos(7x) + cos(5x) = cos(7x)

Remove parenthesis around (5x)
osC * 5x + cos(7x) + cos(5x) = cos(7x)

Reorder the terms for easier multiplication:
5osC * x + cos(7x) + cos(5x) = cos(7x)

Multiply osC * x
5osxC + cos(7x) + cos(5x) = cos(7x)

Remove parenthesis around (7x)
5osxC + cos * 7x + cos(5x) = cos(7x)

Reorder the terms for easier multiplication:
5osxC + 7cos * x + cos(5x) = cos(7x)

Multiply cos * x
5osxC + 7cosx + cos(5x) = cos(7x)

Remove parenthesis around (5x)
5osxC + 7cosx + cos * 5x = cos(7x)

Reorder the terms for easier multiplication:
5osxC + 7cosx + 5cos * x = cos(7x)

Multiply cos * x
5osxC + 7cosx + 5cosx = cos(7x)

Reorder the terms:
7cosx + 5cosx + 5osxC = cos(7x)

Combine like terms: 7cosx + 5cosx = 12cosx
12cosx + 5osxC = cos(7x)

Remove parenthesis around (7x)
12cosx + 5osxC = cos * 7x

Reorder the terms for easier multiplication:
12cosx + 5osxC = 7cos * x

Multiply cos * x
12cosx + 5osxC = 7cosx

Solving
12cosx + 5osxC = 7cosx

Solving for variable 'c'.

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

Add '-7cosx' to each side of the equation.
12cosx + -7cosx + 5osxC = 7cosx + -7cosx

Combine like terms: 12cosx + -7cosx = 5cosx
5cosx + 5osxC = 7cosx + -7cosx

Combine like terms: 7cosx + -7cosx = 0
5cosx + 5osxC = 0

Add '-5osxC' to each side of the equation.
5cosx + 5osxC + -5osxC = 0 + -5osxC

Combine like terms: 5osxC + -5osxC = 0
5cosx + 0 = 0 + -5osxC
5cosx = 0 + -5osxC
Remove the zero:
5cosx = -5osxC

Divide each side by '5osx'.
c = -1C

Simplifying
c = -1C

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