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