Apple iPod touch iOS 2.1 - Manual (Page 85)

Chapter 7 More Applications 85
log Returns the log base 10 of a value.
sin Calculates the sine of a value.
sin -1 Calculates the arc sine of a value. (Available when the 2nd button is clicked.)
cos Calculates the cosine of a value.
cos -1 Calculates the arc cosine of a value. (Available when the 2nd button is clicked.)
tan Calculates the tangent of a value.
tan -1 Calculates the arc tangent of a value. (Available when the 2nd button is clicked.)
ln Calculates the natural log of a value.
log2 Calculates the log base 2. (Available when the 2nd button is clicked.)
sinh Calculates the hyperbolic sine of a value.
sinh -1 Calculates the inverse hyperbolic sine of a value. (Available when the 2nd button is
clicked.)
cosh Calculates the hyperbolic cosine of a value.
cosh -1 Calculates the inverse hyperbolic cosine of a value. (Available when the 2nd button is
clicked.)
tanh Calculates the hyperbolic tangent of a value.
tanh -1 Calculates the inverse hyperbolic tangent of a value. (Available when the 2nd button is
clicked.)
e x Click 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 clicked.)
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.