Differentiate the following function u = Cos(x3)

 u = Cos(x3)

To differentiate this function we will use the chain rule. Firstly we will set xto another variable name such as v. So now v = x3 . Lets differentiate this. dv/dx = 3x2

We can now differentiate cos(v) du/dv = -sin(v). Now to complete the chain rule we must do dv/dx*du/dv. Which will be -sin(v)*3x= -3x2sin(v). Now we can just put the x3 back in instead of the v and our final answer will be -3x2sin( x3).

Answered by Serena B. Maths tutor

2823 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Solve 4cos(2x )+ 2sin(2x) = 1 given -90° < x < 90°. Write 4cos(2x )+ 2sin(2x) in the form Rcos(2x - a), where R and a are constants.


Differentiate cos^2(x)


Sketch the curve y=x^2-x-6


How do you differentiate y = 5 x^3 + 1/2 x^2 + 3x -4


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences