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Simplifying cos(3x) + cos(5x) + cos(9x) = cos(7x) Remove parenthesis around (3x) cos * 3x + cos(5x) + cos(9x) = cos(7x) Reorder the terms for easier multiplication: 3cos * x + cos(5x) + cos(9x) = cos(7x) Multiply cos * x 3cosx + cos(5x) + cos(9x) = cos(7x) Remove parenthesis around (5x) 3cosx + cos * 5x + cos(9x) = cos(7x) Reorder the terms for easier multiplication: 3cosx + 5cos * x + cos(9x) = cos(7x) Multiply cos * x 3cosx + 5cosx + cos(9x) = cos(7x) Remove parenthesis around (9x) 3cosx + 5cosx + cos * 9x = cos(7x) Reorder the terms for easier multiplication: 3cosx + 5cosx + 9cos * x = cos(7x) Multiply cos * x 3cosx + 5cosx + 9cosx = cos(7x) Combine like terms: 3cosx + 5cosx = 8cosx 8cosx + 9cosx = cos(7x) Combine like terms: 8cosx + 9cosx = 17cosx 17cosx = cos(7x) Remove parenthesis around (7x) 17cosx = cos * 7x Reorder the terms for easier multiplication: 17cosx = 7cos * x Multiply cos * x 17cosx = 7cosx Solving 17cosx = 7cosx Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-7cosx' to each side of the equation. 17cosx + -7cosx = 7cosx + -7cosx Combine like terms: 17cosx + -7cosx = 10cosx 10cosx = 7cosx + -7cosx Combine like terms: 7cosx + -7cosx = 0 10cosx = 0 Divide each side by '10'. cosx = 0.0 Simplifying cosx = 0.0 The solution to this equation could not be determined.
| 4x-42=2x-26 | | X^5x=4 | | 2(u-7)-4=-3(-5u+8)-9u | | 6(x+3)=2(x-3) | | -1=x^2+3x-1 | | 2(x^2-10)+3x=0 | | (2x+10)=46 | | t(x)=x^2+3x-1ift(-1) | | -3x+8=50+4x | | Log(4x+8)=3 | | 3+4v=25 | | (4x+5)+(-5x+8)= | | 8x=49 | | -2(2y-3)+2y=6+2(3y-1) | | 22x-9-15x+3=22x-8-15x+14 | | 42-2x=2x-26 | | t(x)=x^2+3x-1 | | 8+1+2+3+8+5+3+3= | | 3(x-2)=6x+3 | | 8y=3x+20 | | 6x^2+12x-82=0 | | 9x^2-11-6x=0 | | 4ln(x)+3y^2=1 | | (5x+3)+(-6x+8)= | | 3u-5+2(4u+3)=-7(u+2) | | 8+6+7+5= | | 7x+11-9x=14-15x+13x-3 | | 3+1+9+6+3+9+5+5= | | 6-2(3x-1)=-10 | | -9(-16-q)=4(1-3q) | | 8y+7y=3-2y | | -3x-4-7=-2x-17+6-8 |