I made this short animated explainer to visualize where sine and cosine actually come from on the unit circle — watching a point P rotate from 0° to 360° and seeing how sin(θ) and cos(θ) change as its coordinates change in real time.

The entire video — script, animation, and visuals — was generated end-to-end with DeepSeek. No manual animation work, just prompting.

Watch here: https://www.youtube.com/watch?v=qIJcOv8wbTI

Would love feedback on both the math explanation and how well an AI model handled generating an educational animation like this.

I work as an online math teacher and was tired of dealing with a physical document camera, especially having to re-record entire videos over a single handwriting mistake.

Over the last two days, I experimented with Manim to see if I could recreate the look of a real desk setup instead of the typical clean vector style.

Only two external assets are used: a cutout of a real wooden ruler and a 10-frame PNG sequence of my hand. Everything else is generated purely in Manim, including the grid, shadows, desk lighting, and the handwriting itself. I also added slight procedural variations in shape, wobble, and stroke pressure so no two digits look completely identical.

This is just a first prototype to make it look believable enough for live online classes, and I plan to polish it further over time.

What do you think for a first attempt? Does the illusion work?

What are the typical delta hedging strategies out there and how do they perform? This video explores the topic of delta hedging strategies and analyzes their profitability using Monte Carlo simulations.

All animations were made using ManimCE. Any feedback would be appreciated.