LEXIBOOK GC500i Instruction Manual page 13

sin cos tan
-1 -1 -1
sin cos tan
I D D I E E I F F
Press one of these keys prior to entering a value to obtain the respective trigonometric function for the
G
value
Press and then one of these keys prior to entering a value to obtain the respective inverse
SHIFT
G
trigonometric function for the value.
Press in the BASE-N mode to enter D, E, F (13
G
d/c
Fraction / Negative key
ab/c
Neg G
Use this key for input of simple fractions and mixed fractions
G
Ex. To input 23/45: 23 ab/c 45
For improper fractions, press this key following
G
Press in the BASE-N mode prior to entering a value to obtain the negative of that value. The negative
G
number is the two's complement of the value entered.
→ Assignment key
 Scl  H
Press prior to entering a memory to assign the result of a calculation to the memory
G
Ex To assign the result of 12+45 to memory A: 12+45 °˙
Press this key following
G
, ;
Parenthesis keys
( )
I J
Press the open parenthesis key and the closed parenthesis key at the position required in a formula.
G
When pressed following the
G
arguments in coordinate transformation or consecutive calculations.
Abs
Power / Absolute value key
y
x
and  CL  K
Enter x (any number), press this key and then enter y (any number) to compute x to the power of y. In
G
the SD or LR mode, this function is only available after pressing the
Press following the
G
Press in the BASE-N mode to obtain a logical product ("and").
G
Press in the SD or LR mode to delete input data.
G
√
3 −
√
Root / Cube root key
x
or  DT  L
Enter x, press this key and then enter y to calculate the xth root of y. In the SD or LR mode, this
G
function is only available after pressing the
Press following the
G
Press in the BASE-N mode to obtain a logical sum ("or")
G
Used as a data input key in the SD or LR mode.
1.3.6 Contrast adjustment
Pressing the or key following the
Pressing makes the screen lighter, while
display to successively become respectively lighter or darker.
Pressing any other key besides
If the display becomes dim and difficult to read, even if you increase contrast, it probably means that
battery power is getting low. In such a case, replace battery as soon as possible. After replacing battery,
perform the RESET operation.
Contrast adjustment is impossible during range display using the
using the key.
Factor
Copyright L 2002
EXIBOOK
Trigonometric function / Inverse trigonometric function keys
, 14 , 15
10 10
To input 2+3/4: 2 ab/c 3 ab/c 4
(indicated by
SHIFT
to clear all data from the statistical memories.
SHIFT
key, a comma or semicolon can be inserted to separate the
SHIFT
key to obtain the absolute value of a subsequently entered numeric value.
SHIFT
key.
SHIFT
key to obtain the cube root of a subsequently entered numeric value.
SHIFT
key adjusts the contrast of the display.
MODE
makes it darker. Holding either key down will cause the
, , or (as well as
MODE
) of a hexadecimal value.
10
ad/c in this manual)
SHIFT
ALPHA A
EXE
key.
SHIFT
, ) cancels contrast adjustment.
key or during factor display
Range
- 13 -
GB