cos(3x)+2cos(2x)-5cos(x)-6=0

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Solution for cos(3x)+2cos(2x)-5cos(x)-6=0 equation:


Simplifying
cos(3x) + 2cos(2x) + -5cos(x) + -6 = 0

Remove parenthesis around (3x)
cos * 3x + 2cos(2x) + -5cos(x) + -6 = 0

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

Multiply cos * x
3cosx + 2cos(2x) + -5cos(x) + -6 = 0

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

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

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

Multiply cos * x
3cosx + 4cosx + -5cos(x) + -6 = 0

Multiply cos * x
3cosx + 4cosx + -5cosx + -6 = 0

Reorder the terms:
-6 + 3cosx + 4cosx + -5cosx = 0

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

Combine like terms: 7cosx + -5cosx = 2cosx
-6 + 2cosx = 0

Solving
-6 + 2cosx = 0

Solving for variable 'c'.

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

Add '6' to each side of the equation.
-6 + 6 + 2cosx = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 2cosx = 0 + 6
2cosx = 0 + 6

Combine like terms: 0 + 6 = 6
2cosx = 6

Divide each side by '2osx'.
c = 3o-1s-1x-1

Simplifying
c = 3o-1s-1x-1

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