3cos^2x+2cosx-1=0

Simple and best practice solution for 3cos^2x+2cosx-1=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+2cosx-1=0 equation:


Simplifying
3cos2x + 2cosx + -1 = 0

Reorder the terms:
-1 + 2cosx + 3cos2x = 0

Solving
-1 + 2cosx + 3cos2x = 0

Solving for variable 'c'.

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

Add '1' to each side of the equation.
-1 + 2cosx + 1 + 3cos2x = 0 + 1

Reorder the terms:
-1 + 1 + 2cosx + 3cos2x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2cosx + 3cos2x = 0 + 1
2cosx + 3cos2x = 0 + 1

Combine like terms: 0 + 1 = 1
2cosx + 3cos2x = 1

Reorder the terms:
-1 + 2cosx + 3cos2x = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 2cosx + 3cos2x = 0

The solution to this equation could not be determined.

See similar equations:

| 23-(6-8b)= | | 0.5*400x^2+40x=0 | | 2x-17=3x+1 | | 3x-12=7x+5 | | a-2(a-2)=2(1-2a) | | 87x+96(1-x)=90 | | 5n+34=2(1-7)n | | 3p-4=(2p+9) | | p=15n-215 | | 1-(t-1)=2t | | 6+[12*(5-1)+(4-2)-7]= | | F(x)=3-5/4x | | 1/9x2/3 | | -7x+y=23 | | 12(5-3)= | | 3a+4(a-3)= | | x^2-9=4x-13 | | 4x-9y=-31 | | 5z+7=18+9z | | F(x)=9-4x-(8/x) | | 3(n+4)=4(n+7) | | 33q+11-28q=20q-10+10q-4 | | ln(4-8x)=-3 | | y=-0.002x^2+0.3x | | lnx=.21 | | 2(5*3)= | | P^5q^3/p^2q | | 17+17x=396-11x | | 4x^2+800=784 | | 6t+5=4t-7 | | 2r+9=7r-8+12r | | 3(6y+2)=5(4y-2) |

Equations solver categories