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Simplifying sin(2x) * cos(5x) = sin(5x) * cos(2x) Remove parenthesis around (2x) ins * 2x * cos(5x) = sin(5x) * cos(2x) Remove parenthesis around (5x) ins * 2x * cos * 5x = sin(5x) * cos(2x) Reorder the terms for easier multiplication: 2 * 5ins * x * cos * x = sin(5x) * cos(2x) Multiply 2 * 5 10ins * x * cos * x = sin(5x) * cos(2x) Multiply ins * x 10insx * cos * x = sin(5x) * cos(2x) Multiply insx * cos 10cinos^{2}x * x = sin(5x) * cos(2x) Multiply cinos^{2}x * x 10cinos^{2}x^{2}= sin(5x) * cos(2x) Remove parenthesis around (5x) 10cinos^{2}x^{2}= ins * 5x * cos(2x) Remove parenthesis around (2x) 10cinos^{2}x^{2}= ins * 5x * cos * 2x Reorder the terms for easier multiplication: 10cinos^{2}x^{2}= 5 * 2ins * x * cos * x Multiply 5 * 2 10cinos^{2}x^{2}= 10ins * x * cos * x Multiply ins * x 10cinos^{2}x^{2}= 10insx * cos * x Multiply insx * cos 10cinos^{2}x^{2}= 10cinos^{2}x * x Multiply cinos^{2}x * x 10cinos^{2}x^{2}= 10cinos^{2}x^{2}Add '-10cinos^{2}x^{2}' to each side of the equation. 10cinos^{2}x^{2}+ -10cinos^{2}x^{2}= 10cinos^{2}x^{2}+ -10cinos^{2}x^{2}Combine like terms: 10cinos^{2}x^{2}+ -10cinos^{2}x^{2}= 0 0 = 10cinos^{2}x^{2}+ -10cinos^{2}x^{2}Combine like terms: 10cinos^{2}x^{2}+ -10cinos^{2}x^{2}= 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.

| 6x+16=10x-16 | | 4b-12=56 | | 99+9k=9k-27 | | sin(2x)cos(5x)=.5(sin(7x)+sin(3x)) | | (X-10)(x^2+10x+100)=0 | | 0.4[a+2]=2 | | 1.6x=x | | x=20-y | | 9+7m-3-11m= | | 5(x+4)+8(2x+2)=6(x+1)+5(x+10) | | 4x^2=81x | | 10x+13=130 | | lnx^5-lnx^4=0 | | (x-3)(2x+5)(4x)=0 | | y=-2x^2-3x+11 | | 5x+25(14-x)=170 | | 100000=3(x^2+18) | | 5lnx-lnx^4=0 | | (x+2)(x-1)(x-4)=0 | | (x*2)(x-1)(x-4)=0 | | 17n=42 | | 8[2-(3+4x)]-4x=10+2(1-18x) | | 2[w-(4w+12)+6]=2(w+6) | | y+5x=-x^2 | | -15x-20y-17p=91y+15p-31x+10-7 | | -7v+4+v-5= | | -6(v+3)+4v+5=8v+8 | | 3p=39 | | 12.8=3.2y | | 90=-16t^2+90t+2 | | 17p=17 | | -7v+4+v+5= | | 0.25x^2-10x+800=0 | | 11x=5+x | | -4r=16-16r | | 4x-3+3x+1=180 | | Y+-12=-19 | | 48=8a | | x-3(200+80x)=-20 | | 72=9x-36 | | 1-3x+4x= | | (5x+7)(2x^2+4x+1)= | | 2x+3x+2=0 | | 1-3a+10+5a= | | 6y+2=28 | | 8K^2+34K+35=0 | | -11+2x=13-2x | | 4x^2=x+28 | | 110x+400=115x+375 | | 5x-4+3x+12=56 | | -4x+2(x+2)=-2 | | U=-x+2 | | 45xsquared-90x+25=0 | | 12=(x-5)x | | 2x+(-x+1)=4 | | 4(1-3n)-14=4(2n+30)-9n | | 3800-750-x=500 | | -23x+-16=19 | | -3x+7(-8x-5)= | | .2x-2=-x+4 | | x+0.8(x+315)=2x-0.2(x-630) | | 9+10=p | | 3-1=1x | | (4u+7)(3+u)=0 | | 9u^2-21u+10=0 |

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