Cosmos

TI-84 inspired graphing calculator in the browser — Calculator, Graph, and Statistics (including AP Stats) modes.

Launch Cosmos →

Modes

Calculator

• Scientific functions: sin, cos, tan, log, ln, sqrt, exp, abs
• Constants π and e · RAD / DEG · Ans

Graph

• Four function slots (y₁–y₄)
• Pan, zoom, and trace
• TI-84 style Y= editor and window settings

Statistics

• Lists L₁–L₆
• 1-Var / 2-Var stats, LinReg with R²
• χ² tests, binomial & geometric probability
• Z / t / χ² table lookups · scatter · histogram

Run locally

Frontend only (stats work client-side):

python -m http.server 8080
# open http://localhost:8080

Optional Python backend:

cd backend
pip install -r requirements.txt
uvicorn main:app --reload --port 8000

Then serve the frontend as above. Backend is optional — the UI falls back to in-browser stats.

Stack

JavaScript frontend · optional FastAPI backend · GitHub Pages deploy