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(cos(4*x)*tan(4*x))'The calculation above is a derivative of the function f (x)
(cos(4*x))'*tan(4*x)+cos(4*x)*(tan(4*x))'
cos(4*x)*(tan(4*x))'-sin(4*x)*(4*x)'*tan(4*x)
cos(4*x)*(tan(4*x))'-sin(4*x)*((4)'*x+4*(x)')*tan(4*x)
cos(4*x)*(tan(4*x))'-sin(4*x)*(0*x+4*(x)')*tan(4*x)
cos(4*x)*(tan(4*x))'-sin(4*x)*(0*x+4*1)*tan(4*x)
4*(-sin(4*x))*tan(4*x)+cos(4*x)*(tan(4*x))'
cos(4*x)*(tan(4*x))'-4*sin(4*x)*tan(4*x)
cos(4*x)*((4*x)'/((cos(4*x))^2))-4*sin(4*x)*tan(4*x)
cos(4*x)*(((4)'*x+4*(x)')/((cos(4*x))^2))-4*sin(4*x)*tan(4*x)
cos(4*x)*((0*x+4*(x)')/((cos(4*x))^2))-4*sin(4*x)*tan(4*x)
cos(4*x)*((0*x+4*1)/((cos(4*x))^2))-4*sin(4*x)*tan(4*x)
cos(4*x)*(4/((cos(4*x))^2))-4*sin(4*x)*tan(4*x)
4*(cos(4*x))^-1-(4*sin(4*x)*tan(4*x))
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