4cosx-2cosx-1=0

Solution for 4cosx-2cosx-1=0 equation:

Simplifying
4cosx + -2cosx + -1 = 0

Reorder the terms:
-1 + 4cosx + -2cosx = 0

Combine like terms: 4cosx + -2cosx = 2cosx
-1 + 2cosx = 0

Solving
-1 + 2cosx = 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 + 1 + 2cosx = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2cosx = 0 + 1
2cosx = 0 + 1

Combine like terms: 0 + 1 = 1
2cosx = 1

Divide each side by '2osx'.
c = 0.5o-1s-1x-1

Simplifying
c = 0.5o-1s-1x-1