Texas Instruments PLUS TI-89 - Manual (Page 402)

Chapter 23: Activities 385
23ACTS.DOC TI-89/TI-92 Plus: Activities (English) Susan Gullord Revised: 02/23/01 1:24 PM Printed: 02/23/01 2:20 PM Page 385 of 26
5. Compute the exact maximum
length of the pole.
Enter: c ( 2 ± )
6. Compute the approximate
maximum length of the pole.
Result: Approximately 20.8097
feet.
Hint: Use the auto-paste
feature to copy the result
from step 4 to the entry line
inside the parentheses of
c( )
and press ¥ ¸ .