Sharp Elw531h Owners Manual

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y = 4 ÷ xandx =  2 + 3
OperationDisplay
23
4
Last Answer Memory
Automatically recalls the last answer calculated by pressing
Solve for x first and then solve for y using x.
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OperationDisplay
User-Defined Functions
Recall a function that was defined by the user.
APPLICATIONS:
Functions that you have previously defined, including those using 
common 2nd Function buttons, can be stored in D1~ D4 for 
later use, thus saving time on keystrokes.
26
~
~
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Operation
Absolute Value
Returns an absolute value.
Display
3
–4
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							23 [DEG mode]

Operation Display
 sinθ =ba
tanθ =bc
cosθ =ca
a
cb
θ
Trigonometric functions determine the ratio of three sides 
of a right triangle. The combinations of the three sides are 
sin, cos, and tan. Their relations are:
Trigonometric Functions
Calculates the sine of an angle.
Calculates the cosine of an angle.
Calculates the tangent of an angle.
The angle from a point 15 meters from
a building to the highest floor of the
building is 45°. How tall is the building?
45 15
15
View point
APPLICATIONS:
Trigonometric functions are useful in mathematics and various engineering 
calculations. They are often used in astronomical observations, civil engi-
neering and in calculations involving electrical circuits, as well as in calcula-
tions for physics such as parabolic motion and wave motion.
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[DEG mode]

OperationDisplay
θ = sin-1b
a
θ = cos-1c
a
θ = tan-1b
c
c a
b
θ
10080
Arc Trigonometric Functions
Arc trigonometric functions, the inverse of trigonomet-
ric functions, are used to determine an angle from ratios
of a right triangle. The combinations of the three sides
are sin
-1, cos-1, and tan-1. Their relations are;
(arc sine) Determines an angle based on the ratio
b/a of two sides of a right triangle.
(arc cosine) Determines an angle based on the ratio
c/a for two sides of a right triangle.
(arc tangent) Determines an angle based on the
ratio b/c for two sides of a right triangle.
At what angle should an airplane climb in order
to climb 80 meters in 100 meters?
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Hyperbolic Functions
The hyperbolic function is defined by using natural exponents in trigo-
nometric functions.
Arc hyperbolic functions are defined by using natural logarithms in trigono-
metric functions.
APPLICATIONS:
Hyperbolic and arc hyperbolic functions are very useful in electrical 
engineering and physics.
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Rectangular coordinates
P (x,y) y
x
o y
x
y
P (r,
θ)
x
or
Polar coordinates
θ

[DEG mode]
OperationDisplay
73
7.623.2
Coordinate Conversion
θConverts rectangular coordinates to polar coordinates (x, y → r,   )
θConverts polar coordinates to rectangular coordinates (r,    → x, y)
Splits data used for dual-variable data input.
Determine the polar coordinates (r,   ) when the rectangu-
lar coordinates of Point P are (x = 7, y = 3).θ
APPLICATIONS:
Coordinate conversion is often used in mathematics and engineering, espe-
cially for impedance calculations in electronics and electrical engineering.
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Binary, Pental, Octal,  
Decimal, and Hexadecimal  
Operations (N-Base)
This calculator can perform conversions between numbers expressed in binary, pental, octal, 
decimal, and hexadecimal systems. It can also perform the four basic arithmetic operations, 
calculations with parentheses and memory calculations using binary, pental, octal, decimal, 
and hexadecimal numbers. In addition, the calculator can carry out the logical operations 
AND, OR, NOT, NEG, XOR, and XNOR on binary, pental, octal, and hexadecimal numbers.
Conversion is performed on the displayed value when these keys are pressed.
Operation Display
HEX(1AC)   BIN   PEN   OCT   DEC
1011 AND 101 = (BIN)  DEC

OperationDisplay
1AC
1011
101
Converts to the binary system. 
BIN appears.
Converts to the pental system. 
PEN appears.
Converts to the octal system. 
OCT appears.
Converts to the hexadecimal system. 
HEX appears.
Converts to the decimal system. 
BIN, PEN, OCT, and HEX 
disappear from the display.
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OperationDisplay
Data table 1
No.
Score
No. of pupils 1   2   3   4   5   6   7   8
  30   40   50   60   70   80   90  100
 2   4   5   7  12  10   8   2
Select single-variable statistics mode
Statistics Functions
The statistics function is excellent for analyzing qualities of an event. Though primarily
used for engineering and mathematics, the function is also applied to nearly all other
fields including economics and medicine.
DATA INPUT AND CORRECTION
Enters data for statistical calculations.
Splits data used for dual-variable data input.
(Used for dual-variable statistical calculations.)
Here is a table of examination results. Input this data 
for analysis. Clears data input.
.
.
.
30 2
100 2
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Calculates the average value of the data (sample data x).
Calculates the standard deviation for the data (sample data x).
Calculates the standard deviation of a data population (sample data x).
Displays the number of input data (sample data x).
Calculates the sum of the data (sample data x).
Calculates the sum of the data (sample data x) raised to the second power.
NOTE:
1. Sample data refers to data selected randomly from the population.
2.  Standard deviation of samples is determined by the sample data    
  shift from an average value.
3.  Standard deviation for the population is standard deviation when   
  the sample data is deemed a population (full data).
Let’s check the results based on the previous data.
“ANS” KEYS FOR 1-VARIABLE STATISTICS
69 (average value)
17.75686128 (standard deviation)
17.57839583 (standard deviation of the population)
50 (total count of data)
3450 (total)
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