5cos^2x-cosx-4=0

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


Simplifying
5cos2x + -1cosx + -4 = 0

Reorder the terms:
-4 + -1cosx + 5cos2x = 0

Solving
-4 + -1cosx + 5cos2x = 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 + -1cosx + 4 + 5cos2x = 0 + 4

Reorder the terms:
-4 + 4 + -1cosx + 5cos2x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -1cosx + 5cos2x = 0 + 4
-1cosx + 5cos2x = 0 + 4

Combine like terms: 0 + 4 = 4
-1cosx + 5cos2x = 4

Reorder the terms:
-4 + -1cosx + 5cos2x = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -1cosx + 5cos2x = 0

The solution to this equation could not be determined.

See similar equations:

| 22/3/.14=(3.14)d/3.14 | | 3(2y+2)= | | 0.75x-6=0.125x+4 | | x^2+20=39 | | h(x)=-0.5x^2+4 | | 0.166x+0.083=0.333x-0.166 | | y^2-2y=80 | | 60/x-10logx=33 | | 9.5+8.6x=83.5+x | | 4m^2+m-3=0 | | 9x=62 | | K^2=-8k | | h=16t^2+1600 | | E=280+0.03s | | 3(2a-3)-4a=11 | | 0.333x+1=0.833x-3 | | 400+20(h-40)=680 | | -1.04-3x+5=0.5 | | -10p+60=-1h+10000 | | 4y^2+1=5y | | 4(y-5)+8=-16 | | 8.6x+12.04=-11.4x+11.22 | | 11x+11y=165 | | 3x^2-4=4x-3 | | 10y-4=0 | | 6x^3+16=178 | | -0.96-3x+5=1.23 | | 2y+35=32+4y | | -0.96-3x+5=1.21 | | f(-5)=-4x-5+3 | | -0.96-3x+5=0.5 | | -7=6-(8-b) |

Equations solver categories