2cos^2x-5cosx-5=0

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


Simplifying
2cos2x + -5cosx + -5 = 0

Reorder the terms:
-5 + -5cosx + 2cos2x = 0

Solving
-5 + -5cosx + 2cos2x = 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 + -5cosx + 5 + 2cos2x = 0 + 5

Reorder the terms:
-5 + 5 + -5cosx + 2cos2x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -5cosx + 2cos2x = 0 + 5
-5cosx + 2cos2x = 0 + 5

Combine like terms: 0 + 5 = 5
-5cosx + 2cos2x = 5

Reorder the terms:
-5 + -5cosx + 2cos2x = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -5cosx + 2cos2x = 0

The solution to this equation could not be determined.

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