Scientific Calculator
Full scientific calculator with sin, cos, tan, logarithms, square root, factorial, and more. Free online calculator for students and professionals.
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Scientific Calculator — How to Use Trigonometric and Logarithmic Functions
A scientific calculator extends a basic calculator with mathematical functions used in science, engineering, and advanced mathematics. Trigonometric functions (sin, cos, tan) calculate ratios in right triangles — toggle between degrees and radians depending on your application. The log function computes base-10 logarithm (common log), while ln computes the natural logarithm (base e ≈ 2.718). The square root (√) and power (x^y) functions handle algebraic operations. Factorial (n!) calculates the product of all positive integers up to n — 5! = 120. The constant π (pi ≈ 3.14159) is used in geometry and trigonometry. Use parentheses to control the order of operations in complex expressions.