icon-Dgl Calculator for general second order differential equations

ODE:  y′′ = f(x,y,y′)

f(x,y,y′) =

cl

ok

Pos1

End

7

8

9

/

x

y

y′

4

5

6

*

π

(

)

1

2

3

-

a

b

c

0

.

+

sin

cos

tan

ex

ln

log10

asin

acos

atan

x2

√x

xy

|x|

sinh

cosh

Step size

Numerics:
Method

Range values ​​of the axes

x-min= x-max=
y-min= y-max=

Range values ​​of the parameters

a-min= a-max=
b-min= b-max=
c-min= c-max=

Current value of the initial values

x0= y0= y′0=

Current value of the parameter

a=
b=
c=

Numerical solution of the ordinary second order differential equation

The solution of the differential equation is solved numerically. The method can be selected. Three Runge-Kutta methods are available: Heun, Euler and RK4. The initial value can be varied by dragging the red point on the solution curve. In the input field for f (x, y) may be used up to three parameters a, b and c can be varied by means of the slider in the graphics.

Usable expressions in the definition of the function f(x,y)

Constants

NameDescription
LN2Natural logarithm of 2
LN10Natural logarithm of 10
LOG2EBase 2 logarithm of EULER
LOG10EBase 10 logarithm of EULER
PIRatio of the circumference of a circle to its diameter
SQRT1_2Square root of 1/2
SQRT2Square root of 2

Trigonometric Functions

FunctionDescription
sin(x)sine of x
cos(x)Cosine of x
tan(x)Tangent of x
asin(x)arcsine
acos(x)arccosine of x
atan(x)arctangent of x
atan2(y, x)Returns the arctangent of the quotient of its arguments.
cosh(x)Hyperbolic cosine of x
sinh(x)Hyperbolic sine of x

Logarithm and Exponential

FunctionDescription
pow(b, e)e to the b
sqrt(x)Square root of x
exp(x)EULER to the x
log(x), ln(x)Natural logarithm
log(x, b)Logarithm to base b
log2(x), lb(x)Logarithm to base 2
log10(x), ld(x)Logarithm to base 10

More functions

FunctionDescription
ceil(x)Get smallest integer n with n > x.
abs(x)Absolute value of x
max(a, b, c, ...)Maximum value of all given values.
min(a, b, c, ...)Minimum value of all given values.
random(max = 1)Generate a random number between 0 and max.
round(v)Returns the value of a number rounded to the nearest integer.
floor(x)Returns the biggest integer n with n < x.
factorial(n)Calculates n!
trunc(v, p = 0)Truncate v after the p-th decimal.
V(s)Returns the value of the given element, e.g. sliders and angles.