3cos^2x-4cosx-2=0

Simple and best practice solution for 3cos^2x-4cosx-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 3cos^2x-4cosx-2=0 equation:


Simplifying
3cos2x + -4cosx + -2 = 0

Reorder the terms:
-2 + -4cosx + 3cos2x = 0

Solving
-2 + -4cosx + 3cos2x = 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 + -4cosx + 2 + 3cos2x = 0 + 2

Reorder the terms:
-2 + 2 + -4cosx + 3cos2x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -4cosx + 3cos2x = 0 + 2
-4cosx + 3cos2x = 0 + 2

Combine like terms: 0 + 2 = 2
-4cosx + 3cos2x = 2

Reorder the terms:
-2 + -4cosx + 3cos2x = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + -4cosx + 3cos2x = 0

The solution to this equation could not be determined.

See similar equations:

| 4/8x=14 | | x^4+x^3-7x^2-2x+8=0 | | 8(n+6)-n=90 | | 3w-6+2w=3w-6+w | | -7x-38=-10x+49 | | 15z^5/18z^2 | | 3+3(-3x-7)=-90 | | 2x3/5= | | 6x8/7= | | 5a-8=45 | | -8(-2+7k)=-152 | | 3(x-4-5)-5(6+x)=6(x-6+8) | | 1/7(7x-7)=-5/8-9/8 | | -5(2n+5)=-85 | | 5m+4+18=5m | | 1+2x-4=-3+1x | | -16x^2+40x=10x | | 100xY=6.0458 | | -13n=8n-3(n-4) | | -5(n-3)-(3n-4)=-4+(6n-3) | | .05x=x-190 | | X^2+11=26 | | x-2=24/x | | -24=-7v+5(v-8) | | r-0.4=2 | | 5(x-2)-7(x+4)=-4(x+16) | | 16x^2+40x=10x | | 3+20=33-6 | | 1728=b*48 | | 0.5q-3r=-3.9 | | 24s+9=144 | | 6x-4(x-8)=-10 |

Equations solver categories