KU Interactive Mathematics
 Course Info Office Hours Exams LiveMath TI Help KU Math Dept Home
 TI
 

 
We will graph the circle of radius 1 centered at the origin (0, 0).

What to Enter Screen Shots
Press MODE. Then, you will see this:
Scroll down then right to select PAR.
Press 2ND and QUIT. Then, you will see a blank screen.
Press Y=. Then, you will see this:

The parametric representation of the unit circle  x2 + y2 = 12  is given by  x = cos(t)  and  y = sin(t).

Since the TI is in the parametric mode, pressing X,T,θ,n displays  T, not  X.

Enter X1T = cos(T) and Y1T = sin(T).
Press GRAPH. Then, you will see a shabby-looking circle. Why?
We need some serious adjustments of window parameters.

Press WINDOW. Remember that T is measured in radians and that it takes only 2π radians to make a full one turn.

Change the values as shown on the right:
Tmin = 0, Tmax = 2π, Tstep = π/10.
Scroll down and further enter values as shown on the right.

We choose different values for Xmax/min and Ymax/min only because the physical size of the LCD display is a rectangle, not a square.
Then, press GRAPH.
 
 TI
 Course Info Office Hours Exams LiveMath TI Help KU Math Dept Home
 KU Interactive Mathematics

Disclaimer • Updated September 4, 2008
Email: mitsuma@kutztown.edu
Phone: +1 (610) 462-WPJW