Misalkan f(x)=cos(sin2x) makan f'(x)=...

f(x) = cos(sin(2x))
dit: f'(x) =?
jawab :
jika g = sin(u)
maka g' = u' cos(u)
jadi,
f(x) = cos(sin(2x))
f'(x) = -sin(sin(2x)) . cos(2x) . 2
f'(x) = -2cos(2x)sin(sin(2x))