What is the derivative of #sqrt[arctan(x)]#? Calculus Differentiating Trigonometric Functions Differentiating Inverse Trigonometric Functions 1 Answer Truong-Son N. Jun 12, 2015 #d/(dx) sqrtu = 1/(2sqrtu) * (du)/(dx)# #d/(dx) arctanu = 1/(1+u^2) * (du)/(dx)# Putting them together: #d/(dx)[sqrt(arctanx)] = 1/(2sqrt(arctanx))*1/(1+x^2)# #= 1/(2(1+x^2)sqrtarctanx)# Answer link Related questions What is the derivative of #f(x)=sin^-1(x)# ? What is the derivative of #f(x)=cos^-1(x)# ? What is the derivative of #f(x)=tan^-1(x)# ? What is the derivative of #f(x)=sec^-1(x)# ? What is the derivative of #f(x)=csc^-1(x)# ? What is the derivative of #f(x)=cot^-1(x)# ? What is the derivative of #f(x)=(cos^-1(x))/x# ? What is the derivative of #f(x)=tan^-1(e^x)# ? What is the derivative of #f(x)=cos^-1(x^3)# ? What is the derivative of #f(x)=ln(sin^-1(x))# ? See all questions in Differentiating Inverse Trigonometric Functions Impact of this question 7479 views around the world You can reuse this answer Creative Commons License