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Simplifying sin(2x) * cos(x) + -1cos(2x) * sin(x) = 0 Remove parenthesis around (2x) ins * 2x * cos(x) + -1cos(2x) * sin(x) = 0 Reorder the terms for easier multiplication: 2ins * x * cos * x + -1cos(2x) * sin(x) = 0 Multiply ins * x 2insx * cos * x + -1cos(2x) * sin(x) = 0 Multiply insx * cos 2cinos^{2}x * x + -1cos(2x) * sin(x) = 0 Multiply cinos^{2}x * x 2cinos^{2}x^{2}+ -1cos(2x) * sin(x) = 0 Remove parenthesis around (2x) 2cinos^{2}x^{2}+ -1cos * 2x * sin(x) = 0 Reorder the terms for easier multiplication: 2cinos^{2}x^{2}+ -1 * 2cos * x * ins * x = 0 Multiply -1 * 2 2cinos^{2}x^{2}+ -2cos * x * ins * x = 0 Multiply cos * x 2cinos^{2}x^{2}+ -2cosx * ins * x = 0 Multiply cosx * ins 2cinos^{2}x^{2}+ -2cinos^{2}x * x = 0 Multiply cinos^{2}x * x 2cinos^{2}x^{2}+ -2cinos^{2}x^{2}= 0 Combine like terms: 2cinos^{2}x^{2}+ -2cinos^{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.

| 75+45n=345 | | 6x^2-36x-84=0 | | A+15+9=4+8 | | 9(1-x)=2(1+2x)+6 | | 19.5+6.5t=10.6206-0.4t | | -3(-4y-6y)+7(-y+5)=-8 | | xa=8-3x | | 74x-69=-30 | | 5(2)-3y=4 | | 2*2.6-4y-7=0 | | 33+.33=.99s | | 12x+28y=-84 | | x+2y+5=180 | | 18a^2-36a+10= | | -2x+6.5[-6(2x+4)-10]=20 | | 2x-7=3x-10 | | 4m^2=9 | | 3x-4(-5)=4 | | 14336(67577)52x=367 | | 3x+y+5=180 | | 44+7p=-4 | | 6x-10y=-76 | | 4x^2+5=3x | | 19x+18=21x | | 3(x-5)=-15 | | 4y+16=36 | | 4f+1+2.50=14.30 | | -3*2+6y=-5 | | -13ab-(2ab)= | | 4f+2.50=14.30 | | 5x^2-20x-15=0 | | -x^2+10x+32=0 | | 7m+9=6(m+3) | | 9n+46=1+8n | | m+5(-3m-3)=-87 | | 3(-1)-4y=4 | | -2(x+30)=4x-3 | | x^2=-10x-1 | | 0=19 | | 4(-3)+4(3)=0 | | 64x^8y^18= | | -7x^2+42x+7=0 | | 4(-2)+4(2)=0 | | -4y+11y= | | 13=5+g-9 | | 3-11xn=9+5xn | | 5y^2-9y^2-2y=0 | | 7x^2-x=14 | | 15x-2x= | | 3x-1.5(1)=-1.5 | | 7x+8=6x+12 | | 3(1.5)-1.5y=-1.5 | | 2y+8=2x-37 | | 3x-7(-3)=3 | | 12X^2-72X+1296=0 | | 43x+90=44x-30 | | 5x+127=2x+95 | | -11-10k=-41 | | 6x+16=2x+48 | | 24x+19=23x+80 | | 9+9x=11-17 | | -2y-7=4y+11 | | y=-lx-5l | | 2x+8=2x-32 | | 5(3x-10)=3(5x-4) |

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