Scientific Calculator - sin, cos, tan, log, sqrt

Most scientific calculators default to degrees (DEG mode) for everyday use, but switch to radians (RAD) when working with calculus, physics, or computer programming. Our calculator has a toggle to switch between modes.

log(x) is the base-10 logarithm, while ln(x) is the natural logarithm with base e. Natural log is useful in calculus, physics, and engineering.

You have two ways: (1) Click the on-screen buttons to build an expression, then press =; (2) Type directly into the input field — e.g., "sin(30)", "2*pi", "sqrt(144)", or "log(100)". Press Enter or click = to evaluate.

sin / cos / tan — trigonometric functions (argument in current angle mode). sin⁻¹ / cos⁻¹ / tan⁻¹ — inverse trig, returns angle in current mode. √ — square root. log — base-10 logarithm. ln — natural logarithm (base e). π — pi constant (~3.14159). e — Euler constant (~2.71828). n! — factorial (e.g., 5! = 120). x^y — exponentiation (e.g., 2^10 = 1024).

Yes — typing is often faster. Use these symbols: * for multiply, / for divide, ^ for power, π or pi for pi, e for Euler, sqrt(...) for root, log(...) for base-10 log, ln(...) for natural log, sin(...) etc. for trig, asin(...) for inverse trig, ! after a number for factorial. Parentheses work as expected for grouping: (3+4)*2-sqrt(25) = 9.

Common causes: missing closing parenthesis (sin(30 without )), using decimal points in factorials (5.5! is undefined), or typing an unsupported function name. The calculator only recognizes: sin, cos, tan, asin, acos, atan, sqrt, log, ln, and parentheses.

No — each calculation is independent. Use the C button to clear the current expression, or ⌫ to delete one character at a time.