cos(3x)cos(9x)+sin(3x)sin(9x)=0

Simple and best practice solution for cos(3x)cos(9x)+sin(3x)sin(9x)=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(3x)cos(9x)+sin(3x)sin(9x)=0 equation: 


Simplifying
cos(3x) * cos(9x) + sin(3x) * sin(9x) = 0

Remove parenthesis around (3x)
cos * 3x * cos(9x) + sin(3x) * sin(9x) = 0

Remove parenthesis around (9x)
cos * 3x * cos * 9x + sin(3x) * sin(9x) = 0

Reorder the terms for easier multiplication:
3 * 9cos * x * cos * x + sin(3x) * sin(9x) = 0

Multiply 3 * 9
27cos * x * cos * x + sin(3x) * sin(9x) = 0

Multiply cos * x
27cosx * cos * x + sin(3x) * sin(9x) = 0

Multiply cosx * cos
27c2o2s2x * x + sin(3x) * sin(9x) = 0

Multiply c2o2s2x * x
27c2o2s2x2 + sin(3x) * sin(9x) = 0

Remove parenthesis around (3x)
27c2o2s2x2 + ins * 3x * sin(9x) = 0

Remove parenthesis around (9x)
27c2o2s2x2 + ins * 3x * ins * 9x = 0

Reorder the terms for easier multiplication:
27c2o2s2x2 + 3 * 9ins * x * ins * x = 0

Multiply 3 * 9
27c2o2s2x2 + 27ins * x * ins * x = 0

Multiply ins * x
27c2o2s2x2 + 27insx * ins * x = 0

Multiply insx * ins
27c2o2s2x2 + 27i2n2s2x * x = 0

Multiply i2n2s2x * x
27c2o2s2x2 + 27i2n2s2x2 = 0

Solving
27c2o2s2x2 + 27i2n2s2x2 = 0

Solving for variable 'c'.

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

Add '-27i2n2s2x2' to each side of the equation.
27c2o2s2x2 + 27i2n2s2x2 + -27i2n2s2x2 = 0 + -27i2n2s2x2

Combine like terms: 27i2n2s2x2 + -27i2n2s2x2 = 0
27c2o2s2x2 + 0 = 0 + -27i2n2s2x2
27c2o2s2x2 = 0 + -27i2n2s2x2
Remove the zero:
27c2o2s2x2 = -27i2n2s2x2

Divide each side by '27o2s2x2'.
c2 = -1i2n2o-2

Simplifying
c2 = -1i2n2o-2

Combine like terms: -1i2n2o-2 + i2n2o-2 = 0
c2 + i2n2o-2 = 0

The solution to this equation could not be determined.

See similar equations:

| 12(n+6)=96 | | 8+3=5x+9 | | -9(w-8)=7w+24 | | -9y+48=-3(y-8) | | 2x+x+20.5=121 | | 7x+4x-3x+5x+3= | | 11w=144-5w | | 6[log(x)+6]=17 | | -34=3(x-6)-5x | | 2*x=40000+(1.20x) | | 3(x-5)+7=4X | | -4(u-9)=-2u+20 | | -74-11x=52-5x | | 5x-7/-4=-7 | | 3(x-5)+7=4 | | 112x-12x+12-112= | | -7c=15-8c | | -14b=-2b-3b | | 3cos(3x)=-4 | | 252=5(3x+11) | | X^4-3x^3+5x^2=y | | 30x-18=0 | | G(3)=3x-8 | | 2.12=1.3x+1.6 | | 50a-204=a | | 4x-2y+2z= | | 37=-7u+3(u+3) | | 0.5=-2.7x+3.2 | | 6y=2y*3 | | 3a-12=a+8 | | 0.5=-2.7(2.25)+3.2 | | 2(x-1)-3=3 |

Equations solver categories