Cos(2x)+7cos(x)=8

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Solution for Cos(2x)+7cos(x)=8 equation: 


Simplifying
Cos(2x) + 7cos(x) = 8

Remove parenthesis around (2x)
osC * 2x + 7cos(x) = 8

Reorder the terms for easier multiplication:
2osC * x + 7cos(x) = 8

Multiply osC * x
2osxC + 7cos(x) = 8

Multiply cos * x
2osxC + 7cosx = 8

Reorder the terms:
7cosx + 2osxC = 8

Solving
7cosx + 2osxC = 8

Solving for variable 'c'.

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

Add '-2osxC' to each side of the equation.
7cosx + 2osxC + -2osxC = 8 + -2osxC

Combine like terms: 2osxC + -2osxC = 0
7cosx + 0 = 8 + -2osxC
7cosx = 8 + -2osxC

Divide each side by '7osx'.
c = 1.142857143o-1s-1x-1 + -0.2857142857C

Simplifying
c = 1.142857143o-1s-1x-1 + -0.2857142857C

Reorder the terms:
c = -0.2857142857C + 1.142857143o-1s-1x-1

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