What is the derivative of #sec((x^2)+3x)#? Calculus Differentiating Trigonometric Functions Derivatives of y=sec(x), y=cot(x), y= csc(x) 1 Answer Salvatore I. Nov 13, 2016 #tan(x^2+3x)/cos(x^2+3x)*(2x+3)# Explanation: #d/dx(1/cos(x^2+3x))=-(-sin(x^2+3x)/cos^2(x^2+3x)*(2x+3))# Answer link Related questions What is Derivatives of #y=sec(x)# ? What is the Derivative of #y=sec(x^2)#? What is the Derivative of #y=x sec(kx)#? What is the Derivative of #y=sec ^ 2(x)#? What is the derivative of #y=4 sec ^2(x)#? What is the derivative of #y=ln(sec(x)+tan(x))#? What is the derivative of #y=sec^2(x)#? What is the derivative of #y=sec^2(x) + tan^2(x)#? What is the derivative of #y=sec^3(x)#? What is the derivative of #y=sec(x) tan(x)#? See all questions in Derivatives of y=sec(x), y=cot(x), y= csc(x) Impact of this question 1666 views around the world You can reuse this answer Creative Commons License