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Scientific calculator keys, 155 scientific calculator keys – Apple iPhone 4G User Manual

Page 155

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Scientific Calculator Keys

Rotate iPhone to landscape orientation to display the scientific 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 first 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.

155

Chapter 19

Calculator

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