Trigonometric Functions Calculator

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On this page is a trigonometric functions calculator, which calculates the result for a given input angle for the 6 trigonometric functions – sine, cosine, tangent, cotangent, secant, and cosecant.

Trigonometry Functions Calculator

Using the Trigonometric Functions Calculator

To use the tool to find the results of the trigonometric functions for a given angle, enter the angle, choose how its measured (degrees or radians) and compute.

  • Angle: Enter the angle which you'd like to compute the functions using
  • Degrees or Radians: Choose which units you use to measure the angle

Where results are undefined, you'll see "NaN".

What are the trigonometric functions?

The trigonometric functions, which are defined in terms of the unit circle – or, for angles under 90 degrees (square), alternatively defined using a right triangle.

Unit Circle to illustrate trigonometry.
Unit circle diagram (CC By-SA 3.0 Wikimedia)
Right triangle to illustrate trigonometry functions
Right Triangle Diagram (CC By-SA 3.0 Wikimedia)

In terms of the right triangle, the functions are defined as:

  • sine: opposite/hypotenuse
  • cosine: adjacent/hypotenuse
  • tangent: opposite/adjacent
  • cotangent: adjacent/opposite
  • secant: hypotenuse/adjacent
  • cosecant: hypotenuse/opposite

If you know the result of one of the trigonometric functions already, you can reverse it into an angle using the inverse trigonometry functions calculator.

Trigonometric Functions

We've built tools for computing both the trigonometric functions and their inverses. Find them here:



PK started DQYDJ in 2009 to research and discuss finance and investing and help answer financial questions. He's expanded DQYDJ to build visualizations, calculators, and interactive tools.

PK lives in New Hampshire with his wife, kids, and dog.

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