- #1

VVS

- 91

- 0

## Homework Statement

I want to evaluate the derivative of spherical harmonics with respect to the azimuthal angle and express it in terms of spherical harmonics.

**2. Homework Equations and 3. The Attempt at a Solution**

I have calculated the derivative of the spherical harmonic with respect to the azimuthal angle.

I know how to express the derivative of the spherical harmonic in terms of spherical harmonics for positive m. But I don't know how to do this for negative m.

View attachment Spherical_Harmonics.pdfThanks for your help.