How do you find the derivative of #cosx^tanx#? Calculus Differentiating Trigonometric Functions Derivative Rules for y=cos(x) and y=tan(x) 1 Answer Monzur R. Jul 16, 2017 #d/dx(cosx^tanx)=(sec^2xlncosx-tan^2x)cosx^tanx # Explanation: First define #y= cosx^tanx# Then, by definition, #lny =tanxlncosx# And #1/y(dy/dx) = sec^2 xlncosx -(sinx/cosx)tanx# #dy/dx=y(sec^2xlncosx - tan^2x)# #=(sec^2xlncosx-tan^2x)cosx^tanx# Answer link Related questions What is the derivative of #y=cos(x)# ? What is the derivative of #y=tan(x)# ? How do you find the 108th derivative of #y=cos(x)# ? How do you find the derivative of #y=cos(x)# from first principle? How do you find the derivative of #y=cos(x^2)# ? How do you find the derivative of #y=e^x cos(x)# ? How do you find the derivative of #y=x^cos(x)#? How do you find the second derivative of #y=cos(x^2)# ? How do you find the 50th derivative of #y=cos(x)# ? How do you find the derivative of #y=cos(x^2)# ? See all questions in Derivative Rules for y=cos(x) and y=tan(x) Impact of this question 1177 views around the world You can reuse this answer Creative Commons License