8cos^3(x)-4cosx-1=0

Solution for 8cos^3(x)-4cosx-1=0 equation:

Simplifying
8cos3(x) + -4cosx + -1 = 0

Multiply cos3 * x
8cos3x + -4cosx + -1 = 0

Reorder the terms:
-1 + -4cosx + 8cos3x = 0

Solving
-1 + -4cosx + 8cos3x = 0

Solving for variable 'c'.

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

Add '1' to each side of the equation.
-1 + -4cosx + 1 + 8cos3x = 0 + 1

Reorder the terms:
-1 + 1 + -4cosx + 8cos3x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -4cosx + 8cos3x = 0 + 1
-4cosx + 8cos3x = 0 + 1

Combine like terms: 0 + 1 = 1
-4cosx + 8cos3x = 1

Reorder the terms:
-1 + -4cosx + 8cos3x = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + -4cosx + 8cos3x = 0

The solution to this equation could not be determined.