*  Reading Outline, Sec3.6 *
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* Vocabulary/Definitions *
 - {d\over dx} ln(x) = 
 - {d\over dx} \arctan(x) = 
 - {d\over dx} \arcsin(x) = 
 - {d\over dx} f^{-1}(x) = 



* Understand *
1. Use the method the book uses to find d/dx arctan(x) to find
d/dx arccos(x).  You will want to use the fact that
sin(arccos(x)) = sqrt{1 - x^2}.


2. Find the derivative of g(x) = 3x ln(sqrt{x} - 3).


3. Find the derivative of f(y) = 3 arctan(3y - e^y).