Really Quick Differential Equation question

  • #1
Saladsamurai
3,019
6
!Really Quick Differential Equation question...

Homework Statement


Alright so this is what I have for this problem. As you can see I used -i to find my Eigenvectors...now when I find my solution and plug it back into the original, I am getting the opposite of what I am supposed to get.

Was I supposed to use -t instead of +t in my solution since I used lambda=-i to find it?
Or did I make some stupid algebraic error again?


Picture3-4.png


THanks!
 

Answers and Replies

  • #2
Saladsamurai
3,019
6
I am thinking I should have used cos(-t) and sin(-t) since I used [itex]-i\Rightarrow \alpha=0\ \beta=-1[/itex]
 
  • #3
Saladsamurai
3,019
6
I am thinking I should have used cos(-t) and sin(-t) since I used [itex]-i\Rightarrow \alpha=0\ \beta=-1[/itex]

I replaced t with -t and this worked. So I will assume my reason was correct.
 

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