report on calculator
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8/10/2019 Report on Calculator
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Short History
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A calculator is a device that can be used to
make many different types of mathematicalcalculations, so there are many differenttypes of calculators to handle the differentfunctions.
The designs and sizes of calculators varybased on what they are to be used for. Somecalculators are designed for specificpurposes, such as different trades or
businesses, while others can be used justfor basic mathematical calculations, likeaddition and multiplication.
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The most basic kind of electronic calculator
today is the pocket calculator, which in its
simplest form can be solar powered and
used to do most standard math problems.
Scientific and graphing calculators are
much more advanced than more
simple calculators, and they are usedprimarily in the areas of science,
mathematics, engineering and physics.
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In the modern world, some pocket
calculators are now so powerful that
they are really computers in their own.
Many come with powerful
programming capabilities andgraphics.
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Scientific calculators offer, in addition
to the basic arithmetic operations,
transcendental functions such assines, logarithms and powers.
These functions are computed as
required by the calculator using series
expansions.
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Financial calculators are designed for
people working with money, particularly
those making investment decisions over
long periods where the time value of
money becomes significant.
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Care should be taken in selecting the
scientific calculator to fit your needs.
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The calculator you choose
must have more than the
basic functions.
You will be performing
operations beyond
addition, subtraction,multiplication and division.
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Many of the functions are only
available when the correct
MODE KEY is selected.
Some of the function keys
are usually blue or yellow
keys marked [ 2nd ] and [3rd ] depending on the
model of your calculator.
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Inverse
Trigonometric
functions
Trigonometric
functions
Degree and
Radian mode
Pi [ ].
Change sign
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Logarithms
Last Answer
MemoryPercent
Inputs Fractions
Factorials
Time
calculation
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The exponential
function will vary
between scientific
calculators.
The exponential key allows
you to enter values that
have a power of ten
associated with them.
The
exponent
Some have an
[ENG] key
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The exponential function is not to be confused with the exponent function
of raising a value to a power .The most common
is of course the
square key, [ x2 ].
When you enter a value and
press the [ x2 ] key you calculate
the square of the value.
Like the square key, [ x2 ], a key
marked [ xy ] allows you to
calculate values raised to a
power above 2.
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The square root key , calculates the square root of a
value
In some calculators
you must enter the
value first,
then press the
key.
x
x
Recall that x½ = x
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This function finds the number ofthe different possible ordering in
selecting r objects from a set of n
objects.
For example:
In how many different ways
may four newly admitted patients
be assigned to four available beds
in the hospital?
Solution: nPr = 24
4(nPr)4 = 24
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This function finds the number ofselecting r objects from a set of n
objects.
For example:Find the number of
combinations when 5 pieces of
flowers are to be given to 5 girls.
Solution: nCr = N
5(nCr)5 = 1
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