Limits and Derivatives

Evaluate $\lim{x \to 0} \frac{\tan x}{x}$....

Evaluate $\lim{x \to 0} \frac{e^x - 1}{x}$....

Evaluate $\lim{x \to 0} \frac{\log(1+x)}{x}$....

What is the derivative of $f(x) = x^n$ with respect to $x$?...

What is the derivative of $\sin x$ with respect to $x$?...