Getting started

Conventional View

You can change units of angle between degree and radian by pressing this key. The current unit is shown at the top-left corner of the top text box.

This is to calculate arcsine, arccosine and arctangent.

sin^-1(0.5)*6: "." + "5" + "arc" + "sin" + "*" + "6" + "="
tan^-1(1): "1" + "arc" + "tan"

This is to calculate hyperbolic sine, cosine, tangent. The way of using is the same as that of arc.

By clicking this button, you can turn on and off the mark "fix" at the left-bottom corner of the top text box. While "fix" is on, a small fraction less than 10^-8 will be rounded.

These are parentheses. You can make a hyerarchy structure like below.

2*((2+3)+(5-1)): "2" + "*" + "[{(" + "[{(" + "2" + "+" + "3" + ")}]" + "[{(" + "5" + "-" + "1" + ")}]" + ")}]"

You can store up to six results in the six smaller boxes by using the "kin" key with a number key like "kin" + "1". Press "kout"+"1" and so on to reuse a stored number.

Only this key is related not to science but to economy. This key is to calculate a price of something inclding a tax. Although the tax rate is 5% in Japan now, you might want to change the rate in your country. Then right-click on the "1.05" key and select the context menu "change tax rate". A dialog window opens and you can enter a new number in a text box. The same thing can be done by selecting a menu [Help]-[Change Tax Rate].

History View

1234
-56
123.45678
6.022e+23
-1.902e-19

pi = 3.14159265358979: π (circle ratio)
en = 2.71828182845905: Napier's number
me = 9.1093897E-31: electron rest mass in [kg]
c = 299792458: light speed in [m/s]
ec = 1.60217733E-19: elementary charge in [C]
f = 96485.309: Faraday constant in [C/mol]
g = 9.806: gravitational acceleration in [m/s^2]
gu = 6.67259E-11: universal gravitation constant in [m^3/kg s^2]
h = 6.6260755E-34: Planck constant in [J s]
hb = 1.0545726691251E-34: h/2π
kb = 1.380658E-23: Boltzmann constant in [J/K]
na = 6.0221367E+23: Avogadoro's constant in [/mol]
rg = 8.31451: gas constant in [J/mol K]
mb = 9.2740154E-24: Bohr magneton in [J/T]
mn = 5.0507866E-27: nuclear magneton in [J/T]

+, -, *, /, ^
"*", "/" and "^" represents operations of multiplication, division and power.
Followings are the priority and examples.

( and ) > ^ > * and / > + and -

1+2[enter] -> 3
3.141-2.718[enter] -> 0.423
-4560*9.4[enter] -> -42864
1.23e+5/3[enter] -> 41000
2^10[enter] -> 1024

sqrt
This is a function to calculate a real solution of square root of a plus number.

sqrt(.36)[enter] -> 0.6
sqrt(-1)[enter] -> Evaluation Impossible

!
This gives a factorial of an integer.

5![enter] -> 120
0![enter] -> 1
3.4![enter] -> Evaluation Impossible

sin
This is a function to calculate a sine of a real number.

sin(pi/2)[enter] -> 1

cos
This is a function to calculate a cosine of a real number.

cos(-pi)[enter] -> -1

tan
This is a function to calculate a tangent of a real number.

tan(pi/4)[enter] -> 0.999999999999999

cosec
This is a function to calculate a cosecant of a real number.

cosec(pi/6)[enter] -> 2

sec
This is a function to calculate a secant of a real number.

sec(2*pi/3)[enter] -> -2.00000000000002

cot
This is a function to calculate a cotangent of a real number.

cot(pi-pi/4)[enter] -> -0.99999999999999

asin
This is a function to calculate a arcsine of a real number.

asin(1)[enter] -> 1.5707963267949

acos
This is a function to calculate a arccosine of a real number.

acos(1)[enter] -> 0

atan
This is a function to calculate a arctangent of a real number.

atan(1)[enter] -> 0.785398163397448

angle
You can choose a unit of angle from radian and degree using this item.

sinh
This is a function to calculate a hyperbolic sine of a real number.

sinh(1)[enter] -> 1.1752011936438

cosh
This is a function to calculate a hyperbolic cosine of a real number.

cosh(-1)[enter] -> 1.54308063481524

tanh
This is a function to calculate a hyperbolic tangent of a real number.

tanh(10)[enter] -> 0.999999995877693

asinh
This is a function to calculate the inverse function of a hyperbolic sine of a real number.

asinh(1.1752011936438)[enter] -> 0.999999999999999

acosh
This is a function to calculate the inverse function of a hyperbolic cosine of a real number.

acosh(1.54308063481524)[enter] -> 0.999999999999997

atanh
This is a function to calculate the inverse function of a hyperbolic tangent of a real number.

atanh(0.999999995877693)[enter] -> 10.0000000224525

exp
This is a function to calculate the expornential of a real number.

exp(2)[enter] -> 7.38905609893065

ln/log
This is a function to calculate the natural logarithm of a real number.

ln(el)[enter] -> 1

log10
This is a function to calculate the logarithm of a real number.

log10(.001)[enter] -> -3

abs
This is a function giving the absolute value of a real number.

abs(cos(pi))[enter] -> 1

sign
This is a function that returns -1 and 1 for negative and positive numbers, respectively. It gives 0 for 0.

sign(cos(3*pi/4))[enter] -> -1

ceil/ceiling
This function returns the integer that is the smallest in those bigger than a real number.

ceil(4.2)[enter] -> 5
ceil(-4.2)[enter] -> -4

floor
This function returns the integer that is the biggest in those smaller than a real number.

floor(4.8)[enter] -> 4
floor(-4.8)[enter] -> -5

round
This function returns the integer that is the closest to a real number.

round(4.2)[enter] -> 4
round(4.8)[enter] -> 5
round(-4.2)[enter] -> -4
round(-4.8)[enter] -> -5

fix/truncate
This function returns the integer part of a real number.

fix(4.2)[enter] -> 4
fix(4.8)[enter] -> 4
fix(-4.2)[enter] -> -4
fix(-4.8)[enter] -> -4

Column View