Cos^2x+8cosx+3=0

Simple and best practice solution for Cos^2x+8cosx+3=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+8cosx+3=0 equation: 


Simplifying
Cos2x + 8cosx + 3 = 0

Reorder the terms:
3 + 8cosx + os2xC = 0

Solving
3 + 8cosx + os2xC = 0

Solving for variable 'c'.

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

Add '-3' to each side of the equation.
3 + 8cosx + -3 + os2xC = 0 + -3

Reorder the terms:
3 + -3 + 8cosx + os2xC = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 8cosx + os2xC = 0 + -3
8cosx + os2xC = 0 + -3

Combine like terms: 0 + -3 = -3
8cosx + os2xC = -3

Add '-1os2xC' to each side of the equation.
8cosx + os2xC + -1os2xC = -3 + -1os2xC

Combine like terms: os2xC + -1os2xC = 0
8cosx + 0 = -3 + -1os2xC
8cosx = -3 + -1os2xC

Divide each side by '8osx'.
c = -0.375o-1s-1x-1 + -0.125sC

Simplifying
c = -0.375o-1s-1x-1 + -0.125sC

See similar equations:

| 3(5c+1)=18 | | 7(2q-5)-4(7-4q)=37 | | 1/2(x-6)=10 | | 3(4x+5y)= | | 9x+18y-54=0 | | 2/sin(0) | | 3=(2-3x)+2x | | 1+6x=-53 | | 6a-9=5a+10 | | z=m+x-y | | 282=126-u | | 16000000=1+x^2-8000x+16000000 | | k/20=9 | | 12.162-5.895= | | 151-u=231 | | (3x-5)=21 | | -6w-2w=16 | | Y=3x-1(.5) | | 7x-y=6+2(y-x) | | 36-5x=18+4x | | 151=235t-1t^2 | | 19v+2v+4v-11v=9 | | 240in=ft | | 20n^2-3n=5n^2+3-7n | | 9*8*10-(37+4)+2= | | 13r+3r-6r=10 | | x^2+1x+14=0 | | 220=40+t | | 2(x+63)=8x-42 | | -29-31+x= | | 2.222(73.8-x)=(25+x)14.72 | | 2/5(15r-5s)= |

Equations solver categories