Hey, having a little problem with a question because I am a little to unsure how to do it, I've been asked to calculate some exterior differentials, would this be write:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]d\left(r^3 (\cos (4 \theta) dr - r \sin (4\theta) d\theta)\right)[/tex]

Simplified:

[tex]d\left(r^3 \cos (4\theta) dr - r^4 \sin (4\theta) d\theta\right)[/tex]

Goes to:

[tex]2r^3 dr \left(-4 \sin (4\theta) d\theta dr - 4r^3 dr \cos (4\theta) d\theta d\theta \right) = 0[/tex]

Am I even slightly right?

**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!

# Exterior differential

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