cos^2(x)+7cos(x)+6=0

Solution for cos^2(x)+7cos(x)+6=0 equation:

Simplifying
cos2(x) + 7cos(x) + 6 = 0

Multiply cos2 * x
cos2x + 7cos(x) + 6 = 0

Multiply cos * x
cos2x + 7cosx + 6 = 0

Reorder the terms:
6 + 7cosx + cos2x = 0

Solving
6 + 7cosx + cos2x = 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 + 7cosx + -6 + cos2x = 0 + -6

Reorder the terms:
6 + -6 + 7cosx + cos2x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 7cosx + cos2x = 0 + -6
7cosx + cos2x = 0 + -6

Combine like terms: 0 + -6 = -6
7cosx + cos2x = -6

Reorder the terms:
6 + 7cosx + cos2x = -6 + 6

Combine like terms: -6 + 6 = 0
6 + 7cosx + cos2x = 0

The solution to this equation could not be determined.