piaochongdeng/quadratic-exact-lab

Quadratic Exact Lab is an offline-first exact-math application with browser, Electron desktop, and Android front ends. Users enter a quadratic in one of three forms or provide three points; the quadratic workspace derives equivalent forms, characteristics, and domain-specific extrema, then presents a report and plot. A separate trigonometry workspace accepts an angle or function value plus a side and produces ratios, a solved right triangle, reports, and diagrams. The graph follows documented and excerpted relationships; unsampled wiring is omitted where it cannot be verified.