Question

What is the derivative of 3sin(4x)? I have no idea where to begin!!!

Answer 1

3 d/dx sin (4x)

note: d/dx sin u = cos u * du/dx

3 cos (4x) * d/dx (4x)

3 cos (4x) * 4

12 cos(4x)

Answer 2

What is the answer to the equation