Web bonus problem--Week 3

[Victor Ivrii]

a. Find the general solution of
$$
y'+2\cot(t)y=\cos(t).
$$
b. Find solution, which is defined on $(-\infty,\infty)$;
c. Find solution, which is defined on $(-\infty,\infty)$ and periodic.

[Wenzhe Xu]

Here is my attempt, but I'm confusing about question b and c, is my thought right?

[Runcong Wu]

Here, the last one has the wrong image code

[Victor Ivrii]

Looks OK. Could you type it?

[David Chan]

My (typed) solution:

[Rui Zhu]

Hi, here is my solution

[Junya Zhang]

[Yuying Zhai]

Hello, here is my solution.

[Kaiman Chen]

Here is my final answer for week 3 bonus problem

[Xiangji Kong]

[Seunghyun Park]

[Xu Bai]

my solution to week3's problem

[Zhiqing Pan]

[Yufei Cai]

Here is my solution.

[Vivian Ngo]