Trigonometry Calculator
Compute sin, cos, tan and their inverses in degrees or radians — with exact values for common angles and the full working.
Function
Enter a value and press Calculate.
About this calculator
Calculates standard trigonometric functions (sin, cos, tan) and their inverses (asin, acos, atan). Supports both degrees and radians. For the inverse functions, the input must be in [−1, 1] for asin/acos.
Related calculators
How trigonometry works
Trigonometric functions relate the angles of a right triangle to the ratios of its sides: sine is opposite/hypotenuse, cosine is adjacent/hypotenuse, tangent is opposite/adjacent. Inverse functions return the angle whose sin/cos/tan equals the given value. Many angles have exact values involving √2/2, √3/2, and 1/2 — this calculator shows them for common angles (0°, 30°, 45°, 60°, 90°, etc.).