3cos^2x-5cosx-4=0

Simple and best practice solution for 3cos^2x-5cosx-4=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-5cosx-4=0 equation:


Simplifying
3cos2x + -5cosx + -4 = 0

Reorder the terms:
-4 + -5cosx + 3cos2x = 0

Solving
-4 + -5cosx + 3cos2x = 0

Solving for variable 'c'.

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

Add '4' to each side of the equation.
-4 + -5cosx + 4 + 3cos2x = 0 + 4

Reorder the terms:
-4 + 4 + -5cosx + 3cos2x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -5cosx + 3cos2x = 0 + 4
-5cosx + 3cos2x = 0 + 4

Combine like terms: 0 + 4 = 4
-5cosx + 3cos2x = 4

Reorder the terms:
-4 + -5cosx + 3cos2x = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -5cosx + 3cos2x = 0

The solution to this equation could not be determined.

See similar equations:

| 3x+5-4x=-(x+8) | | 17q-11q-19q=14 | | x+6.1=7.2 | | =0.79x+10 | | x-52=-121 | | -3x-7=4+9x | | 4(x+4)=7+3x+5 | | 18-2d=5d | | -12-x=76 | | d*4=96 | | K^2=16/25 | | y=7x-0 | | 4(5x-3)=2(10x+7) | | 2x+2y-3z=10 | | a=3x^4*9x^2 | | 7+x=-66 | | 4x+6x-8=5x+4 | | 5x+-7=13 | | x-(-3)=98 | | x+-19=-35 | | -12+x=-11 | | x=3.8+0.6y | | 6*53/8 | | 2(x+3)+x=-2x+4(x-5) | | f(6)=2x+7 | | -2x+2y=26 | | 3cm+3xcm= | | 6w^2-20w+16= | | 2u+3u=u-16 | | -3x-4y=18 | | 10x+9y=20 | | 2(-4h-13)=37+31h |

Equations solver categories