Yes, absolutely. When you look at the innovations happening to Windows recently like Copilot integration and Recall I’m glad that Linux is “boring”

That requires neither engineering-level math nor paper nor patience. All you need is the chain rule and some basic knowledge of sine and cosine:

The derivative of cos is -sin, but because of the 6x you get an extra factor 6. The sine function is periodic on 2pi, so sin(6*2pi + pi/2) = sin(pi/2) = 1. So the result is -36