Operation Manual

Appendix B: Reference Information 385
Remember that EOS™ evaluates from left to right and calculations within parentheses are evaluated
first. You should use parentheses where the rules of algebra may not be clear. In MathPrint™ mode,
parentheses may be pasted in an expression to indicate how the input is interpreted.
If you are using trigonometric functions or performing polar and rectangular conversions, the
unexpected results may be caused by an angle mode setting. The Radian and Degree angle mode
settings control how the TI-84 Plus C interprets angle values.
To change the angle mode settings, follow these steps:
1. Press z to display the Mode settings.
2. Select
Degree or Radian.
3. Press Í to save the angle mode setting.
Note: See also
e^(iq) calculators. For e^(iq) behavior in Degree and Radian mode, See the Math, Angle,
and Test Operations Chapter.
Note: The n/d fraction MathPrint™ template does not support non-real numbers in the numerator or
denominator entry. Use division or express the complex number as (fraction1) + (fraction2) in your
calculations.
ERR:DIMENSION MISMATCH Error
Your TI-84 Plus C displays the ERR:DIMENSION MISMATCH error if you are trying to perform an
operation that references one or more lists or matrices whose dimensions do not match. For example,
multiplying L1*L2, where L1={1,2,3,4,5} and L2={1,2} produces an ERR:DIMENSION MISMATCH error
because the number of elements in L1 and L2 do not match.
ERR:INVALID DIMENSION Error
The ERR:INVALID DIMENSION error message may occur if you are trying to graph a function that does
not involve the stat plot features. The error can be corrected by turning off the stat plots. To turn the
stat plots off, press y, and then select
4:PlotsOff.
Link-Receive L1 (or any file) to Restore Message
If your TI-84 Plus C is in testing mode, the status bar will display TEST MODE. Your TI-84 Plus C displays
the Link-Receive L1 (or any file) to Restore message if it has been disabled for testing, and not re-
enabled. To restore your calculator to full functionality after testing, link to another TI-84 Plus or
TI-84 Plus C and transfer any file to the disabled calculator, or use TI Connect™ software to download a
file from your computer to your TI-84 Plus C.
To transfer a file from another TI-84 Plus C:
1. On the receiving unit, press y8 and then select
RECEIVE.
2. On the sending calculator, Press y8.
3. Select a file to send by selecting a category, and then selecting a file to send.