Idk why i never learned until now that cos(t) is the derivative of sin(t) lol i remember first learning trig in high school and being like Whats so special about cosine its just sine shifted by 90ยฐbut now im like Ohh at sin(90ยฐ) the slope is 0 which is why cos(90ยฐ) is 0 too and vice versa
5 days ago
