Hi

Can someone help me differentiate the following questions:

1)$\displaystyle \frac{sinx+cosx}{sinx-cosx}$

2)Find the local maximum and minimum values of f(x) for each of the following and state the corresponding x value of each. (Consider $\displaystyle 0<= x <= 2\pi $only):

$\displaystyle f(x)=2cosx+sin2x$

P.S