Differentiation help!?

Question

Differentiate the following function of x (using either the product, quotient or chain rule)

f(x) = cos3x/1+sin3x

Thanks in advance :), 10pts given to the first correct answer with clear working :)

Answer 1

aYoy have dto differentionate between to equations  as f(x) = cos 3x/1+sin 3x

So  f(x) =cos/1+sin