User Guide

Chapter 7 More Applications 97
cosh Calculates the hyperbolic cosine of a value.
cosh
-1
Calculates the inverse hyperbolic cosine of a value. (Available when the 2nd button is
tapped.)
tanh Calculates the hyperbolic tangent of a value.
tanh
-1
Calculates the inverse hyperbolic tangent of a value. (Available when the 2nd button is
tapped.)
e
x
Tap after entering a value to raise the constant “e” (2.718281828459045...) to the power
of that value.
2
x
Calculates 2 to the power of the displayed value. For example, 10 2
x
= 1024. (Available
when the 2nd button is tapped.)
Rad Changes mode to express trigonometric functions in radians.
Deg Changes mode to express trigonometric functions in degrees.
π Enters the value of π (3.141592653589793...).
EE An operator that multiplies the currently displayed value by 10 to the power of the next
value you enter.
Rand Returns a random number between 0 and 1.
Notes
Writing and Reading Notes
Notes are listed by date added, with the most recent note at the top. You can see the
rst few words of each note in the list.
Add a note: Tap , then type your note and tap Done.
Read a note: Tap the note. Tap or to see the next or previous note.
Edit a note: Tap anywhere on the note to bring up the keyboard.
Delete a note: Tap the note, then tap .
Emailing Notes
Email a note: Tap the note, then tap .
To email a note, iPhone must be set up for email. See “Organizing Email” on page 51.