cos(4x)+1=4cos^2(2x)

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Solution for cos(4x)+1=4cos^2(2x) equation:


Simplifying
cos(4x) + 1 = 4cos2(2x)

Remove parenthesis around (4x)
cos * 4x + 1 = 4cos2(2x)

Reorder the terms for easier multiplication:
4cos * x + 1 = 4cos2(2x)

Multiply cos * x
4cosx + 1 = 4cos2(2x)

Reorder the terms:
1 + 4cosx = 4cos2(2x)

Remove parenthesis around (2x)
1 + 4cosx = 4cos2 * 2x

Reorder the terms for easier multiplication:
1 + 4cosx = 4 * 2cos2 * x

Multiply 4 * 2
1 + 4cosx = 8cos2 * x

Multiply cos2 * x
1 + 4cosx = 8cos2x

Solving
1 + 4cosx = 8cos2x

Solving for variable 'c'.

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

Add '-8cos2x' to each side of the equation.
1 + 4cosx + -8cos2x = 8cos2x + -8cos2x

Combine like terms: 8cos2x + -8cos2x = 0
1 + 4cosx + -8cos2x = 0

Add '-1' to each side of the equation.
1 + 4cosx + -1 + -8cos2x = 0 + -1

Reorder the terms:
1 + -1 + 4cosx + -8cos2x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 4cosx + -8cos2x = 0 + -1
4cosx + -8cos2x = 0 + -1

Combine like terms: 0 + -1 = -1
4cosx + -8cos2x = -1

Reorder the terms:
1 + 4cosx + -8cos2x = -1 + 1

Combine like terms: -1 + 1 = 0
1 + 4cosx + -8cos2x = 0

The solution to this equation could not be determined.

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