Cos^2x-cosx-2=0

Simple and best practice solution for Cos^2x-cosx-2=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

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


Simplifying
Cos2x + -1cosx + -2 = 0

Reorder the terms:
-2 + -1cosx + os2xC = 0

Solving
-2 + -1cosx + os2xC = 0

Solving for variable 'c'.

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

Add '2' to each side of the equation.
-2 + -1cosx + 2 + os2xC = 0 + 2

Reorder the terms:
-2 + 2 + -1cosx + os2xC = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1cosx + os2xC = 0 + 2
-1cosx + os2xC = 0 + 2

Combine like terms: 0 + 2 = 2
-1cosx + os2xC = 2

Add '-1os2xC' to each side of the equation.
-1cosx + os2xC + -1os2xC = 2 + -1os2xC

Combine like terms: os2xC + -1os2xC = 0
-1cosx + 0 = 2 + -1os2xC
-1cosx = 2 + -1os2xC

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

Simplifying
c = -2o-1s-1x-1 + sC

See similar equations:

| V/2=1 | | 3a+14=5n | | 3n+12=26n | | -8a+32b=(2a+b) | | 2x^2+4x+5=6 | | -5(x+3)=42+4x | | 14=7(1+8x)+7(1-8x) | | x+6x+9=1 | | 3x-8x-12=18 | | 500+x(25)=1000 | | 4x+39=7x | | -8a+32b= | | 8n^2+2n+5=0 | | (7x-2)(3x+1)=3(1-3x) | | -5(v-7)=5v-15 | | 6Z-5+5-6Z= | | 31-3k=k | | 4a+9+55+60=180 | | c-7_/3=3 | | 15=-6x+3x-3 | | j+4j= | | 76h-85h=3 | | 6K-6K= | | -5(x-7)=50 | | 5x+32=2x-x | | 180.00+x(0.15)=268.50 | | 300-20n=100 | | 10X+7-5X= | | X/4-3=21 | | 20n+300=100 | | X/4-3==21 | | T/3-9=3 |

Equations solver categories