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Simplifying cos(2x) * cos(x) = sin(4x) * sin(x) Remove parenthesis around (2x) cos * 2x * cos(x) = sin(4x) * sin(x) Reorder the terms for easier multiplication: 2cos * x * cos * x = sin(4x) * sin(x) Multiply cos * x 2cosx * cos * x = sin(4x) * sin(x) Multiply cosx * cos 2c^{2}o^{2}s^{2}x * x = sin(4x) * sin(x) Multiply c^{2}o^{2}s^{2}x * x 2c^{2}o^{2}s^{2}x^{2}= sin(4x) * sin(x) Remove parenthesis around (4x) 2c^{2}o^{2}s^{2}x^{2}= ins * 4x * sin(x) Reorder the terms for easier multiplication: 2c^{2}o^{2}s^{2}x^{2}= 4ins * x * ins * x Multiply ins * x 2c^{2}o^{2}s^{2}x^{2}= 4insx * ins * x Multiply insx * ins 2c^{2}o^{2}s^{2}x^{2}= 4i^{2}n^{2}s^{2}x * x Multiply i^{2}n^{2}s^{2}x * x 2c^{2}o^{2}s^{2}x^{2}= 4i^{2}n^{2}s^{2}x^{2}Solving 2c^{2}o^{2}s^{2}x^{2}= 4i^{2}n^{2}s^{2}x^{2}Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '2o^{2}s^{2}x^{2}'. c^{2}= 2i^{2}n^{2}o^{-2}Simplifying c^{2}= 2i^{2}n^{2}o^{-2}Take the square root of each side: c = {-1.414213562ino^{-1}, 1.414213562ino^{-1}}

| x^2+.11-.057=0 | | (4a^5b^4)(6ab^2)= | | (-6-8x+8x^2)-(-4+3x+1x^2)= | | 32+x*2=180 | | (-6-8x+8x^2)-(-4+3x+1x)= | | (2x+3.5)(2x+3)=15 | | 8+(8-3)+64= | | 7x+-2y=6 | | 7(-8r+3)=245 | | x^2+.19x-.089=0 | | 2y=-x+18 | | (x+4)(x-1)= | | X+30=64 | | 0.05x-5=-4 | | -9n^2-24n+16=0 | | x=19+3(x+y) | | 3-(2-x)=-2(-2x-4) | | 5x-22=83 | | .222n+5=10 | | (2x-3)(4x+2)= | | logx-log(x-5)=1 | | .625a+6=.750a | | 2n-12=12-4n | | -20+15x=-15 | | 4.5+5=10 | | (n+4)-2(n)=(n+2)-24 | | .222+5=10 | | x^4+10x^3+24x^2-6x-9=0 | | 2g-(8-g)=7g-10 | | 5(x-4)=22-x | | 14+3a=-29-1 | | 6n+7a=10 | | -3(-3x-7)=48 | | 2n+5a=14 | | 5x-t=13 | | 4x+5t=22 | | 3(g-8)=20+2g | | 3x=3-y | | 139=3-8(7-8a) | | 3(g-7)=20+2h | | -12y-10=-6y | | 2pq=p+q | | 8v+6=30 | | c+2d=-7 | | 940=-16x^2+1700 | | 3c-8d=7 | | u=v-16 | | 7r-3s=15 | | 3r-2s=15 | | p+s=14 | | -24x^2-20x=0 | | 300.00+30.00x=-150.00 | | (2x^2-3x+2)(2x^2-3x+2)= | | 3c-4d=-3 | | x^2-75x+650=0 | | 5-b=6b+7-7b | | 2c-3d=-1 | | 3x-3=8x+15 | | 4p-q=6 | | N+45=45 | | (a+4)(a+4)= | | 2(n+2)+3(n+4)=(6*n)-5 | | 4p+5q=47 | | (2d-3)(2d-3)= | | 5p-2q=1 |

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