Question

Find the derivative of y=cosx/(1+sinx)

Answer 1

Quotient rule would work.
What's stopping you?

Answer 2

I'm making a mistake somewhere and I can't tell what I'm doing wrong.

Answer 3

\[
\left(\frac fg \right)'=\frac{f'g-fg'}{g^2}
\]

Answer 4

I need to see work to find a mistake.

Answer 5

In the book the answer is 1/(1+sinx)

Answer 6

\[
\sin^2(x)+\cos^2(x)=1
\]

Answer 7

That's all I needed! Thanks!