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1
vote
1answer
121 views

Trigonometric equation (Lagrange) for the double pendulum [closed]

I want to model a fishing rod and received a suggestion. I therefore try to follow the mathematics (Lagrange) of the double pendulum. I do not understand how to proceed in the step that Wikipedia ...
2
votes
1answer
218 views

Simulate motion of the Kepler orbit using Runge-Kutta 4 method in C++

I have to simulate motion of the Kepler orbit in C++. To do that I need to solve system of equations using Runge-Kutta 4 method. G is gravitational constant and M is Earth mass. This is the code ...
1
vote
0answers
83 views

Analysis of silicon graphene waveguides using finite element methods

How can I create a dynamic mesh for a finite element method to analyze a silicone and graphene waveguide? Knowing that graphene is in nanometer and the silicon waveguide is in micrometer this ...
0
votes
0answers
47 views

Programming on the TI-89 [closed]

This is a rather unusual question, but math-related. I wrote a program in TI-Basic to approximate a root using Newton's Method. That's all fine and dandy, except for when the output of the function ...