Cos^2x-9cosx-10=0

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Solution for Cos^2x-9cosx-10=0 equation: 


Simplifying
Cos2x + -9cosx + -10 = 0

Reorder the terms:
-10 + -9cosx + os2xC = 0

Solving
-10 + -9cosx + os2xC = 0

Solving for variable 'c'.

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

Add '10' to each side of the equation.
-10 + -9cosx + 10 + os2xC = 0 + 10

Reorder the terms:
-10 + 10 + -9cosx + os2xC = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -9cosx + os2xC = 0 + 10
-9cosx + os2xC = 0 + 10

Combine like terms: 0 + 10 = 10
-9cosx + os2xC = 10

Add '-1os2xC' to each side of the equation.
-9cosx + os2xC + -1os2xC = 10 + -1os2xC

Combine like terms: os2xC + -1os2xC = 0
-9cosx + 0 = 10 + -1os2xC
-9cosx = 10 + -1os2xC

Divide each side by '-9osx'.
c = -1.111111111o-1s-1x-1 + 0.1111111111sC

Simplifying
c = -1.111111111o-1s-1x-1 + 0.1111111111sC

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