examine translations and the graphs of y=f(x)+a and y=f(x-b)
examine amplitude changes and the graphs of y=asinx and y=acosx
examine period changes and the graphs of y=sin bx,y=cos bx, and y=tan bx
examine phase changes and the graphs of y=sin(x-c), y=cos(x-c) and y=tan(x-c)
examine the relationships sin(x+π/2)=cosx and cos(x−π/2)=sinx
