In today's class, we had a review class about inverse function, how to find composition functions from f(x) and g(x) . And we talked about the unit circle and the function f(x)=AsinB(X-C)+D
How to find a composition function,
Example: f(x)=x^2-1, g(x)=sinx, find h(x)=((fog)(x) o (gof)(x))
we talked about the Unit Circle, how to find x-corrdinate and y-corrdinate in four quadrants for those special radius, like pai/6, pai/4, pai/3, and their relative radius in quadrand 2, 3, or 4. see the diagram above,( Sorry, it's too dark; ).
And last we talked about the function F(x)= AsinB(X-C)+D
D means shift graph up or down D units ;
A changes the maximun or minimum points of the graph; sign of A means flip the graph of
x-axis or not;
B is effect the input of the graph, it can change the line section chief which arrives the apex.
C mean shift graph left or right C units.
And that'a all for today!
And next scribe is Steve!;)