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Simplifying cos(2x) + 11cos(x) + 5 = 0 Remove parenthesis around (2x) cos * 2x + 11cos(x) + 5 = 0 Reorder the terms for easier multiplication: 2cos * x + 11cos(x) + 5 = 0 Multiply cos * x 2cosx + 11cos(x) + 5 = 0 Multiply cos * x 2cosx + 11cosx + 5 = 0 Reorder the terms: 5 + 2cosx + 11cosx = 0 Combine like terms: 2cosx + 11cosx = 13cosx 5 + 13cosx = 0 Solving 5 + 13cosx = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 13cosx = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 13cosx = 0 + -5 13cosx = 0 + -5 Combine like terms: 0 + -5 = -5 13cosx = -5 Divide each side by '13osx'. c = -0.3846153846o-1s-1x-1 Simplifying c = -0.3846153846o-1s-1x-1
| 3-6x*1/3=7x-1 | | 4a-4whena=9 | | 3x+1=5x-27 | | g/5=16/20 | | 83-e=13 | | f(3)=-4*(3)-1 | | 0.3k(k-0.2)=0.6 | | 4x+4x+36-5x+36-5x=m | | 3y-(4x)= | | 3.9/5=x/90 | | 80=d+8 | | -8(6x-5)= | | 9x^2-x^3=98 | | 33=n-51 | | -2(5y-5)= | | x-23=-5 | | 4x*2=y | | g+98=109 | | (2x+1)(x+4)=3(x^2-4) | | (4x)2+(36-5x)=y | | 3x-59=25 | | 1.39x=12.51 | | 4n-4=-112 | | 2w+9=k | | (1/12)*6 | | n-18=17 | | g/2=2/8 | | 2x(z-12)-1=z-25+2 | | 8e+17= | | a-6=3 | | t/5=5/125 | | 110=1550-90w |