This is another attempt at an earlier question that maybe wasn't done in a readable format.(adsbygoogle = window.adsbygoogle || []).push({});

This was in Strang page 230. Could someone derive this?

[tex]

if K = \left[\begin{array} {cc} 0&-1\\1&0\end{array}\right]

then \quad e^{Kt} = \left[\begin{array} {cc} cos t & -sin t\\sin t & cos t\end{array}\right]

[/tex]

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Rotation try again.

**Physics Forums | Science Articles, Homework Help, Discussion**