(cos^2)(x)-(4)(cosx)-5=0

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Solution for (cos^2)(x)-(4)(cosx)-5=0 equation:


Simplifying
(cos2)(x) + -1(4)(cosx) + -5 = 0

Multiply cos2 * x
cos2x + -1(4)(cosx) + -5 = 0

Multiply -1 * 4
cos2x + -4cosx + -5 = 0

Reorder the terms:
-5 + -4cosx + cos2x = 0

Solving
-5 + -4cosx + cos2x = 0

Solving for variable 'c'.

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

Add '5' to each side of the equation.
-5 + -4cosx + 5 + cos2x = 0 + 5

Reorder the terms:
-5 + 5 + -4cosx + cos2x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -4cosx + cos2x = 0 + 5
-4cosx + cos2x = 0 + 5

Combine like terms: 0 + 5 = 5
-4cosx + cos2x = 5

Reorder the terms:
-5 + -4cosx + cos2x = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -4cosx + cos2x = 0

The solution to this equation could not be determined.

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