How do you find the derivative of # Cos^4(2x)#?
1 Answer
Feb 3, 2016
Use the chain rule twice.
Explanation:
Recall that we use the notation
# = 4(cos(2x))^3(-sin(2x) d/dx(2x))#
# = 4(cos(2x))^3(-sin(2x)(2))#
# = -8cos^3(2x) sin(2x)#
