Below you can find the full step by step solution for you problem. We hope it will be very helpful for you and it will help you to understand the solving process.
(cos(9*x-8))'The calculation above is a derivative of the function f (x)
-sin(9*x-8)*(9*x-8)'
-sin(9*x-8)*((9*x)'+(-8)')
-sin(9*x-8)*(9*(x)'+(9)'*x+(-8)')
-sin(9*x-8)*(9*(x)'+0*x+(-8)')
-sin(9*x-8)*(0*x+9*1+(-8)')
(0+9)*(-sin(9*x-8))
9*(-sin(9*x-8))
-9*sin(9*x-8)
| Derivative of (x^2)*(sin(1/x)) | | Derivative of 10cos(x/2) | | Derivative of e^(x^2)^0.5 | | Derivative of (9/10)*x^(-1/10) | | Derivative of x100e^(ln(1/2)) | | Derivative of sin(e3x) | | Derivative of (3)cos(t^6) | | Derivative of x^2e^7x | | Derivative of e^(-0.01*100) | | Derivative of 33(1.35^x) | | Derivative of 1.35^x | | Derivative of 1/(ln(10)) | | Derivative of (ln(9))^x | | Derivative of t/50 | | Derivative of ln(14) | | Derivative of 3/2x^(5/3) | | Derivative of 3/10x^(1/3) | | Derivative of 5e^-0.5t | | Derivative of 1/3x^(3/2) | | Derivative of 18*(sin(3*x))^2-(18*(cos(3*x))^2) | | Derivative of 4(x^2)y | | Derivative of 17e^(-5x) | | Derivative of 14x-14 | | Derivative of 7(ln(t^9)) | | Derivative of (x^-6)(e^(6x)) | | Derivative of (x^-6)(e^6x) | | Derivative of 3cos(2c) | | Derivative of ((2x^(4)-x))/(x^(3)) | | Derivative of ln((e^(x^(6)))/((x-3)^4)) | | Derivative of (9-x^(2/3))^(3/2) | | Derivative of (x/k)^2 | | Derivative of 4sin(4) |