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GraphViewer - Scientific Calculator for your mobile
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Functions
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Build in functions
Basic operations
Discrete functions
Trigoniometry
Differential functions
Constants
References to other Equations
Basic operations
a + b
: the sum of a and b
a - b
: the difference of a and b
a * b
: a times b
Tip: When a and b are no numbers, the multiplication sign can be omitted:
e.g.: 2epixxsin(x) equals 2*e*pi*x*x*sin(x)
a / b
: a divided by b
a ^ b
: a power b
sqrt(x)
: square root of x
exp(x)
or
e^(x)
: number e power x
ln(x)
: the natural logarithm of x
log(x)
: the 10 base logarithm of x
Discrete functions
abs(f)
: the absolute value of function f
a % b
: a modulo b
a !
: the faculty of a
floor(f)
: the floor of function f (e.g.: floor(3.6) gives 3)
ceil(f):
the ceil of function f (e.g.: ceil(2.1) gives 3)
frac(f)
: the fraction of function f (e.g.: frac(2.345) gives 0.345)
rnd
: random number between 0 (inclusive) and 1 (exclusive)
warning: you can't evaluate nor show the table of an equation using rnd
P(n,k):
the number of
permutations
while chosing k elements out of n elements in a specific order
C(n,k):
the number of
combinations
while chosing k elements out of n elements in any order
Trigoniometry
sin(f)
: the sine of function f (in radians)
cos(f)
: the cosine of function f (in radians)
tan(f)
: the tangent of function f (in radians)
asin(f):
the arc sine of function f (in radians)
acos(f):
the arc cosine of function f (in radians)
atan(f):
the arc tangent of function f (in radians)
sinh(f):
the hyperbolic sine of function f (in radians)
cosh(f):
the hyperbolic cosine of function f (in radians)
tanh(f):
the hyperbolic tangent of function f (in radians)
rad(f)
: converts function f from degrees to radians
Tip
: use "sin(rad(90))" to calculate the sine of 90 degrees (gives 1)
deg(f)
: converts function f from radians to degrees
Tip
: use "deg(asin(1))" to calculate the arc sine of 1 in degrees (gives 90 degrees)
where
f
can be any combination of functions
Differential functions
D(f)
: the
derivate
of function f
I(f):
the
indefinite
integral
of function f, the constant term is chosen so that the integral will go through the origin
I(x1, x2, f(x)):
the
definite
integral
of function f(x) between x1 and x2 :
Constants
e
: the
number e
(e=2.718281828...)
pi
: the
number pi
(pi=3.1415926536...)
Na
:
Avogadro constant
(A=6.02214179e23 / mol)
q
:
Elementary charge
(q=1.602176462e-19 Coulomb)
h
:
Planck constant
(h=6.6260693e-34 J.s)
F
:
Faraday constant
(F=96485.3 Coulomb/mole)
G
:
Gravitational constant
(G=6.67428e-11 m³/kg.s² )
p
:
Permittivity of vacuum or electric constant
ε0 (p=8.854187817e-12 F/m)
m
:
Magnetic constant or vacuum permeability
μ0 (m=1.2566e−6 H/m)
References to other Equations
f(a)
: refers to the a-th equation.
e.g.: eqn1="sin(x)" and eqn2="
f(1)
+1"
is the same as eqn2="sin(x)+1"
Attention:
you can only refer to previous equations
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Designed by
Tim Vermeiren
(2016)
Translated by Tim Vermeiren