Differentiate: f(x)=2(sin(2x))^2 with respect to x, and evaluate as a single trigonometric function.

f(x) = 2sin2(2x)Therefore, using the chain rule: f'(x)=2 x 2cos(2x) x 2sin(2x)(The 2 at the front arises from the constant 2, at the start of f(x), the 2cos(2x) comes from differentiating sin2(2x), then the 2sin(2x) comes from decreasing the original power of the sine function by 1 and multiplying by the constant in the function, 2)Therefore, f'(x)=6cos(2x)sin(2x)As we know 2sin(x)cos(x)=sin(2x) (double-angle formula), we can simplify f'(x) into f'(x)=3sin(4x)

SH
Answered by Sam H. Maths tutor

5180 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Given that y = 4x^3 -1 + 2x^1/2 (where x>0) find dy/dx.


integrate 5x + 3(square root of x)


Integrate 10x(x^1/2 - 2)dx


How do you use trigonometry to work out angles and lengths of sides in a right angle triangle


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:

© 2026 by IXL Learning