Cos(2x)-3cos(x)=4

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Solution for Cos(2x)-3cos(x)=4 equation: 


Simplifying
Cos(2x) + -3cos(x) = 4

Remove parenthesis around (2x)
osC * 2x + -3cos(x) = 4

Reorder the terms for easier multiplication:
2osC * x + -3cos(x) = 4

Multiply osC * x
2osxC + -3cos(x) = 4

Multiply cos * x
2osxC + -3cosx = 4

Reorder the terms:
-3cosx + 2osxC = 4

Solving
-3cosx + 2osxC = 4

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.
-3cosx + 2osxC + -2osxC = 4 + -2osxC

Combine like terms: 2osxC + -2osxC = 0
-3cosx + 0 = 4 + -2osxC
-3cosx = 4 + -2osxC

Divide each side by '-3osx'.
c = -1.333333333o-1s-1x-1 + 0.6666666667C

Simplifying
c = -1.333333333o-1s-1x-1 + 0.6666666667C

Reorder the terms:
c = 0.6666666667C + -1.333333333o-1s-1x-1

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