User Guide

Scientic Calculator Keys
Rotate iPhone to landscape orientation to display the scientic calculator.
2nd Changes the trigonometric buttons (sin, cos, tan, sinh, cosh, and tanh) to their inverse
functions (sin
-1
, cos
-1
, tan
-1
, sinh
-1
, cosh
-1
, and tanh
-1
). It also changes ln to log2, and e
x
to
2
x
. Tap 2nd again to return the buttons to their original functions.
( Opens a parenthetical expression. Expressions can be nested.
) Closes a parenthetical expression.
% Calculates percentages, adds markups, and subtracts discounts. To calculate a
percentage, use it with the multiplication (x) key. For example, to calculate 8% of 500,
enter
500 x 8 % =
which returns 40.
To add a markup or subtract a discount, use it with the plus (+) or minus (–) key. For
example, to compute the total cost of a $500 item with an 8% sales tax, enter
500 + 8 % =
which returns 540.
1/x Returns the reciprocal of a value in decimal format.
x
2
Squares a value.
x
3
Cubes a value.
y
x
Tap between values to raise the rst value to the power of the second value. For
example, to compute 3
4
, enter
3 y
x
4 =
which returns 81.
x! Calculates the factorial of a value.
√ Calculates the square root of a value.
x
√y Use between values to calculate the x root of y. For example to compute
4
√81, enter
81
x
√y 4 =
which returns 3.
159
Chapter 19 Calculator