Education Technology

# Knowledge Base

## Solution 26251: Parametric Graphs not Appearing to Graph Properly on the TI-Nspire™ Family Products.

### Why don't parametric graphs appear to graph properly on the TI-Nspire™ family products?

The TI-Nspire family graphs parametric functions a little differently than previous Texas Instruments graphing products.

For example graph the following parametric function:

x(t) = 5*cos(t)
y(t) = 5*sin(t)
0 ≤ t ≤ 360 tstep=120

To graph the example function:

Please Note: Verify the Graphing Angle mode in Settings is set to Degree. To verify this from the Graph App press [Menu] [9 Settings] and verify Graphing Angle is set to Degree if not change it and click [OK].

1) Press [home] and choose to add a Graphs App.
2) Press [menu] [3] [3] to change the graphing mode to Parametric.

3) Press [5] [x] [trig►] [►] [enter].

4) Press [t] [tab].
5) Press [5] [x] [trig►] [enter].
6) Press [t] [tab].
7) Press [del] [del] [del] [del].
8) Press [1] [2] [0].
9) Press [◄] until you get to the end of 6.28.
10) Press [del] [del] [del] [del].
11) Press [3] [6] [0] [enter].

Please Note: If a graph resembling a triangle is what was expected, follow the steps below to change the attributes of the function.

12) Move the cursor on top of the function and press [ctrl] [menu] [3].
13) Press [▼] [▼] [▼].

14) Press [►] [►] [enter].

Please see the TI-Nspire family guidebooks for additional information.