Homework questions are welcome, as long as they are asked honestly, explain the problem, and show sufficient effort. Please do not use this as the only tag for a question. Please do not add this tag to questions by other people unless they explicitly say that their question is part of their ...
-1
votes
1answer
105 views
I want to draw a graph using a weighted Adjacency matrix
I have a weighted adjacency matrix as follows:
...
3
votes
1answer
114 views
Using single replacement rule to convert algebraic expression
I have been trying this problems for hours and cannot find any helpful clues.
How can I convert $Sinh[3\theta]+Sinh[\theta]$ to a rational function of x given $2Sinh[\theta] = x-x^{-1}$ by using only ...
0
votes
0answers
111 views
Obtaining fourier transform for Root Raised Cosine pulse
I have been trying to obtain the Fourier transform for time domain root-raised-cosine pulse using Mathematica. The answer I'm getting from Mathematica is not the correct answer. When I input the ...
0
votes
1answer
102 views
Wolfram Alpha's Mysterious Trig Abilities [closed]
This is a very straight-forward question:
I'm trying to simplify [sin(2pi*t +pi/4) + sin(2pi*t -pi/4)], and failing at it:
...
0
votes
0answers
97 views
ListPlot and Union related question
This is the question that I got for my assignment:
In a square room with 7 m-long sides, five people (black circles) have
shot at random people. They all had two bullets and killed two people
...
0
votes
1answer
237 views
0
votes
1answer
131 views
Frequency of elements in a list
I've got a list in the format of list={{a,1},{a,1},{b,1},{c,1},{b,1}}
And I want it to "compress" into a list of pairs ...
7
votes
3answers
898 views
Finding unit tangent, normal, and binormal vectors for a given r(t)
For my Calc III class, I need to find $T(t), N(t)$, and $B(t)$ for $t=1, 2$, and $-1$, given $r(t)=\{t,t^2,t^3\}$.
I've got Mathematica, but I've never used it before and I'm not sure how to coerce ...
0
votes
0answers
148 views
Boundary Value Problem
I have to solve this boundary value problem:
$$\frac{\mathrm{d}e_{3x}}{\mathrm{d}l}=(M_0+F_{0z}x-F_{0x}z)e_{3z}$$
$$\frac{\mathrm{d}e_{3z}}{\mathrm{d}l}=-(M_0+F_{0z}x-F_{0x}z)e_{3x}$$
...
2
votes
2answers
191 views
local variable naming & symbolic argument
I'm stuck here with my variable assignment in this scenario
...
2
votes
1answer
601 views
Using triangulation
I have been presented with 3 known points and the power densities at those points. I need to use those points to find the location of the actual antenna which is generating the signals.
Power ...
2
votes
1answer
148 views
Getting the 557th element of a table
Make a table with elements $\sin(\sqrt{8 n}/4) + r\, $for $n$ from $1$ to $1000$, where $r$ is a random real number between $-0.1$ and $0.1$ that is different for each value of $n$. Also make a ...
0
votes
3answers
273 views
Creating simple procedure for The Least-Square $m^\text{th}$ Degree Polynomials
I am CS major, taking Computational Numerical Analysis course. Instructor gave us freedom of choice, we were allowed to use anything or any computer language we picked, I picked Mathematica.This is my ...
5
votes
1answer
217 views
Check homework integration in Mathematica
Given in my homework I have to compute (by hand)
$$\iint\limits_{x^2+y^2\leq 1}(x^2+y^2)\,\mathrm dx\,\,\mathrm dy.$$
My solution so far:
Let $f(x,y)=x^2+y^2$ and $K=\{(x,y)\in\mathbb{R}^2:x^2+y^2\leq ...
0
votes
1answer
310 views
How to solve a problem in relative motion?
I have a project due tomorrow that I have been struggling with for a month. I am utterly stumped, any help would be appreciated. The problem is:
There is a ferris wheel, 30m in radius, set 80m ...
