Question

find $y'$ for each:

1. $y= sin x - cos x$

2. $y= tan x / (x+1)$

3.$y=sin (π/4)$

Answer 1

1. yʼ = sin(x) + cos(x)
2. yʼ = $\frac{(x+1)sec^2(x) - tan(x)}{(x+1)^2}$
3. y' = 0