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Simplifying cos(2x) = 2xsin(2x) Remove parenthesis around (2x) cos * 2x = 2xsin(2x) Reorder the terms for easier multiplication: 2cos * x = 2xsin(2x) Multiply cos * x 2cosx = 2xsin(2x) Remove parenthesis around (2x) 2cosx = 2insx * 2x Reorder the terms for easier multiplication: 2cosx = 2 * 2insx * x Multiply 2 * 2 2cosx = 4insx * x Multiply insx * x 2cosx = 4insx2 Solving 2cosx = 4insx2 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Divide each side by '2osx'. c = 2ino-1x Simplifying c = 2ino-1x
| 2.5x-11.85=8.4 | | (9-d)*9*(9+d)=693 | | 3x(6-x)squared=0 | | (2sinx-1)(1-cosx)=0 | | 16x^3-6x-2=0 | | 100x=200 | | (Xq+5)(xq-5)= | | 9=18-2x | | 30/100=10/x | | 6m+9m+10f+6f= | | 30/10=100/x | | 2/4-x/8-7/6 | | =2kx^3-kx+x+7 | | (4x-9)(x^2-2x-1)= | | 10k-26=44 | | x+1/2+1/4+315=x | | X*y=1000 | | Xxy=1000 | | 1/2+1/4+315=x | | (3x^2+2)(3x^2+2)= | | 3+4y=18 | | 13x-(x-4)=5x+20+x | | -1/2-1/4-315=x | | 49y-22=48y-7 | | 9(x+2)=4(X-1) | | f(x)=2.5 | | 3y-4x+2y= | | (5x+4)(3x+2)=0 | | ax+3=0 | | j^2-39=82 | | x^2-7=68 | | 18x=85 |