A free online trigonometry calculator that computes sin, cos, tan, csc, sec, cot, and inverse functions in degrees or radians, with a unit circle visualization and special angle table.
When to use
Students and professionals need quick, accurate trigonometric calculations without installing software or manually converting between degrees and radians.
How to use
- 1Select the input unit: click 'Degrees (°)' or 'Radians (rad)' tab.
- 2Enter a numeric value in the input field (e.g., 45).
- 3Optionally toggle 'Inverse: On' to compute arcsin, arccos, and arctan.
- 4Click the 'Calculate' button to see results.
- 5View the six trigonometric function values and the unit circle diagram.
- 6Refer to the special angles table for common angle values.
Input & output
Input: a numeric angle in degrees or radians (or a value between -1 and 1 for inverse functions). Output: values for sin, cos, tan, csc, sec, cot (or arcsin, arccos, arctan) with unit label, plus a visual unit circle.
Who it's for
Students learning trigonometry, engineers, and anyone needing quick trigonometric calculations.
FAQ
- Can I switch between degrees and radians?
- Yes, click the 'Degrees (°)' or 'Radians (rad)' tab to change the input unit. The results update accordingly.
- How do I calculate inverse trigonometric functions?
- Click the 'Inverse: On' button, then enter a value between -1 and 1 for arcsin and arccos, or any number for arctan, and press Calculate.
- What does the unit circle show?
- It visually represents the angle on a circle, showing the corresponding point and helping understand the relationship between the angle and trigonometric functions.
- What if I enter an invalid number?
- An error message 'Please enter a valid number' appears, and no results are shown.