Posted by Molly on .
y = (sin x) / (1 + tan x)

calculus 
bobpursley,
Is there a question here?

calculus 
Molly,
Sorry
y'= 
calculus 
Steve,
just use the quotient rule. If
y = u/v
y' = (vu'uv')/v^2
y' = [(1+tanx)(cosx)  (sinx)(sec^2 x)]/(1+tanx)^2
= ((cosx  (sinx)(tan^2 x))/(1+tanx)^2