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Simplifying 1 + cos(3x) + cos(6x) = 0 Remove parenthesis around (3x) 1 + cos * 3x + cos(6x) = 0 Reorder the terms for easier multiplication: 1 + 3cos * x + cos(6x) = 0 Multiply cos * x 1 + 3cosx + cos(6x) = 0 Remove parenthesis around (6x) 1 + 3cosx + cos * 6x = 0 Reorder the terms for easier multiplication: 1 + 3cosx + 6cos * x = 0 Multiply cos * x 1 + 3cosx + 6cosx = 0 Combine like terms: 3cosx + 6cosx = 9cosx 1 + 9cosx = 0 Solving 1 + 9cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 9cosx = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 9cosx = 0 + -1 9cosx = 0 + -1 Combine like terms: 0 + -1 = -1 9cosx = -1 Divide each side by '9osx'. c = -0.1111111111o-1s-1x-1 Simplifying c = -0.1111111111o-1s-1x-1
| 4x^2+21x+24=0 | | -x/3=1/26 | | 2(x+3)-7=18-5(x+4) | | 3x-52x-36=0 | | Cos^2(3x)=(1/2) | | 2/3x48 | | 2/3-13 | | 14+8x=29+15x+5 | | 2=44-8x | | 4x+5=4(x+8) | | xy+4=58 | | 5a-8a=21 | | 58=x+x | | 1/10+1/30=2/15 | | -2y-6=0 | | 145=95+2x | | (9i)(3i)=0 | | 70+39+(2x+1)= | | 78=55+x | | y=-X-100 | | S=4.5+1.6x | | 5x^2+50+125= | | 3e+4e=1 | | .4(x-6)=52 | | 3x^4-20x^2+12=0 | | 14x+19y=421 | | 3p-5=18 | | 2.8X+55.1=212-8.5X | | 6+3S-1=7S+11-3S | | X-30=3+6+X | | 3r^2-r-15=0 | | 27(0.33333333x-0.11111111)=10 |