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Simplifying cos(4x) * cos(2x) = 0 Remove parenthesis around (4x) cos * 4x * cos(2x) = 0 Remove parenthesis around (2x) cos * 4x * cos * 2x = 0 Reorder the terms for easier multiplication: 4 * 2cos * x * cos * x = 0 Multiply 4 * 2 8cos * x * cos * x = 0 Multiply cos * x 8cosx * cos * x = 0 Multiply cosx * cos 8c^{2}o^{2}s^{2}x * x = 0 Multiply c^{2}o^{2}s^{2}x * x 8c^{2}o^{2}s^{2}x^{2}= 0 Solving 8c^{2}o^{2}s^{2}x^{2}= 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '8'. c^{2}o^{2}s^{2}x^{2}= 0 Simplifying c^{2}o^{2}s^{2}x^{2}= 0 The solution to this equation could not be determined.

| 3x+15=10+x | | 2a-2c=6 | | 576=2x^2+x^2 | | 3x+6-7x=12-15x+11x-6 | | k+17=29 | | 2x+4=-5 | | (1+x)+2x=5 | | 5+3(x-4)=5(x+2)-x | | 6l/4-9=3 | | 7x+17=8x+9 | | 20x-10=-5 | | 5(5x-4)+8=-9 | | 9-9m=27+9m | | 5.3x-5.36=4.24-6.7y | | -24-6= | | 0.8(4x+6)=1.9-(x-3) | | (3x+4)(4x+3)= | | 5.7=(r)(10) | | 3x+6x*2=5 | | 11-3x=-7x+15 | | 7x-(x-5)=2 | | 6.4x-4.9x=-27 | | x^3-9*(x^2)+2=0 | | 5x-5-3x=3x-1 | | 14y+6-12= | | -20x-15=9 | | 7.8=(5.7+10)(1) | | 15=6x-1 | | 5(-2+10x)-20=50 | | 4mn+3mn= | | (3x^2-5)-16= | | 22m=-154 | | 3(x-7)+2x=9-x+2y | | 5.7=(r)(1) | | 8xy+20x+6y+15= | | 16=-6x-8 | | a+(-3a)+1=5+5a-(-2) | | x+3y=7x-15 | | (x+2)3-(x-1)3=x(3x+4)+8 | | x+3y=7x-5 | | 3+8j=9-j | | x+2=3x-10(2-x)-5 | | 2(x-9)=x | | -12x-24=18 | | 7.8=(10+r)(1) | | m+3n=17 | | -16y+6y^2= | | 0.15-0.03(x+2)=-0.03(1-x) | | 3=i | | 70+(5x-10)+(4x+12)=180 | | -2x+(-8)=8 | | 2/3x-11=15 | | 5+4+x=8+1 | | 5.7=(R)(T) | | 7+4(-5)= | | 2(x+8)-8x=4 | | 3m+2n=16 | | 7.8=(10+R)(T) | | 4=18x-18 | | 9x-7=4x-22 | | 4(x-3)+5=2x+2(-3+x) | | 6.3+1.1=9.7 | | x+20=821 | | -y+27=0 | | 8(x+8)=64-x |

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