Visual Proof For Hamonic Addition Theorem.

Hi!

My name's Davidson Noby.

I'm a 12th grade student, learning Math/Phy & Chem.

I stumbled upon your video of the harmonic addition theorem when you were solving an integral and I was astonished. It was indeed very cool, but your proof, of comparing was indeed obviously right and Mathematically rigorous, but I wasn't satisfied.

I wanted a geometrical Proof.

So I spend an entire day, and I think I've found something really cool!

Unfortunately, I can't post more than one photo.

Can I reach out to you in some other way?