Cos^2x-3cosx-10=0

Simple and best practice solution for Cos^2x-3cosx-10=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-3cosx-10=0 equation: 


Simplifying
Cos2x + -3cosx + -10 = 0

Reorder the terms:
-10 + -3cosx + os2xC = 0

Solving
-10 + -3cosx + os2xC = 0

Solving for variable 'c'.

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

Add '10' to each side of the equation.
-10 + -3cosx + 10 + os2xC = 0 + 10

Reorder the terms:
-10 + 10 + -3cosx + os2xC = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -3cosx + os2xC = 0 + 10
-3cosx + os2xC = 0 + 10

Combine like terms: 0 + 10 = 10
-3cosx + os2xC = 10

Add '-1os2xC' to each side of the equation.
-3cosx + os2xC + -1os2xC = 10 + -1os2xC

Combine like terms: os2xC + -1os2xC = 0
-3cosx + 0 = 10 + -1os2xC
-3cosx = 10 + -1os2xC

Divide each side by '-3osx'.
c = -3.333333333o-1s-1x-1 + 0.3333333333sC

Simplifying
c = -3.333333333o-1s-1x-1 + 0.3333333333sC

See similar equations:

| 7/3-4/3:4/2 | | X-X^3-1=0 | | (-3x+7)(5x-8)=0 | | 15-s=7d | | 6y+30=9y-6 | | 15.00+2.50h=12.00+3.75h | | -16x^2+64x+20=0 | | (-2x^3+2x^2-8x+2)+(8x^3+8x^2-10x-6)= | | x+15x=80 | | 12.88=6.1x | | 3/4=X/152 | | 6b=-50 | | 3xsquared+24xy+48y=0 | | 1.1/15=9.7/x | | (3x+6)4=0 | | 16p^2+48p+36=0 | | 2/3=x/152 | | (-4)f+25=5(f+5) | | 9y-7=13y-7 | | 2y+3=8y+7 | | 5x-12x=18 | | 42.9/253.1=6.2/x | | y+(-1x)+y=22 | | 60+8x=90+5x | | 5.9=log(x) | | 8x+1=9x+4 | | 5(x+5)=-7(5+x) | | p=5q/m-2n | | 6.5/33.2=x/51.5 | | y*y+6y-100=0 | | 0.5(10x-9)=5x+6 | | p=5p/m-2n |

Equations solver categories