Description:
The Scientific Calculator Web App is a browser-based tool that allows users to perform both basic arithmetic and advanced scientific calculations directly online without installing any software. It provides functions like trigonometric operations, logarithms, exponents, factorials, square roots, and memory storage, making it useful for students, engineers, and researchers.

The backend (PHP, Java, or Node.js) can be used to log calculation history, save user preferences, or provide server-side computation for very complex math. The frontend (HTML, CSS, Bootstrap, JavaScript) ensures a responsive, user-friendly interface with a keypad layout similar to a physical scientific calculator.

Key Features:

• Basic operations: addition, subtraction, multiplication, division.

• Scientific functions: sin, cos, tan, log, ln, π, e, powers, factorial.

• Support for parentheses and operator precedence.

• Memory functions (M+, M-, MR, MC).

• Dark and light themes for better usability.

• Optional history panel to review past calculations.

• Mobile-friendly design for use on smartphones.

Example Use Case:
A physics student working on trigonometry problems can quickly use the app to calculate sin(45°) or solve complex expressions like (5^3 × cos(60°)) / log(100) without needing a separate software installation.