Question

what is the derivative of y=x/(1+cos(x))

Answer 1

\[y=\frac{ x }{ 1+\cos x }\]
\[\frac{ dy }{ dx }=\frac{ \left( 1+\cos x \right)*1-x*(-\sin x) }{ \left( 1+\cos x \right)^2 }=\frac{ 1+\cos x+x \sin x }{ \left( 1+\cos x \right)^2 }\]

Answer 2

thank you

Answer 3

yw