- #1
JulienB
- 408
- 12
Homework Statement
Hi everybody! In the middle of an exercise, our teacher suddenly wrote:
[tex]
sin(\frac{x}{y} sin y) = \frac{x}{y} sin y - \frac{1}{2} sin θ (\frac{x}{y} sin y)^2
[/tex]
I don't get where does that come from? The closest I've managed to reach is:
[tex]
sin(\frac{x}{y} sin y) = \frac{x}{y} sin y - (\frac{x}{y} sin y)^2 \frac{x sin y}{6y} + O(x^5)
[/tex]
What is this θ? It doesn't show up neither before nor after that line :/Thanks in advance for your answers.Julien.