Trigonometric Functions
by Joe Gaines
1. tan(x)=sin(x)/cos(x)
1.1. sin(x)/cos(x)
2. cot(x)=1/tan(x)
3. sec^2(x)=tan^2(x)+1
4. cos^2(x)+sin^2(x)=1
5. sin(2x)=2sin(x)cos(x)
6. csc(x)=1/sin(x)
7. csc^2(x)=1+cot^2(x)
8. cos(2x)=1-sin^2(x)
9. sec(x)=1/cos(x)
10. cos(2x)=2cos^2(x)-1
