Concepts feel karo — tangent lines, maxima, areas, aur differential equations — sab visually!
Point slider move karo. Dekho tangent line (yellow) kaise rotate hoti hai. Jahan slope=0 wahan local maxima/minima hoti hai!
Green = f'(x)>0 (increasing). Red = f'(x)<0 (decreasing). Yellow dots = critical points (f'=0). Kisi bhi function pe try karo!
Limits drag karo aur area change hote dekho. N rectangles badhaate jaao — approximation exact value ke paas aata hai! Yahi Riemann ka idea tha.
Har jagah chhoti line slope dikhati hai — f'(x,y) ka value. Solution curve is slope field ko follow karti hai! Yahi ODE ka geometric meaning hai.