Differentiate y =cos^4(x)

Let u = cos xdu/dx = -sin xy = u4dy/du = 4u3dy/dx = dy/du * du/dx = (4u3 ) * (-sin x) = 4 cos 3 x * -sin x = -4 cos 3 x sin x

CK
Answered by Christiyan K. Maths tutor

4294 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

I need help understanding simultaneous equations with more than two variables, can you please help?


Solve 7x - 3 = 4x + 6


A right-angle triangle has a hypotenuse of 8cm and an angle of 30 degrees. What is the opposite's length?


Draw a graph of x = (y+4)/4.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning