Trigonometric Function Calculator
Calculate trigonometric and inverse trigonometric functions, supporting degree and radian input.
Trigonometric Calculation
Inverse Trigonometric Functions
Special Angle Values
| Angle | sin | cos | tan |
|---|---|---|---|
| 0° | 0 | 1 | 0 |
| 30° | 1/2 | √3/2 | √3/3 |
| 45° | √2/2 | √2/2 | 1 |
| 60° | √3/2 | 1/2 | √3 |
| 90° | 1 | 0 | ∞ |
| 120° | √3/2 | -1/2 | -√3 |
| 180° | 0 | -1 | 0 |
| 270° | -1 | 0 | ∞ |
| 360° | 0 | 1 | 0 |
Basic Formulas
- sin²θ + cos²θ = 1
- tan θ = sin θ / cos θ
- sin(α ± β) = sin α cos β ± cos α sin β
- cos(α ± β) = cos α cos β ∓ sin α sin β
Usage Instructions
Features
Calculates sine, cosine, tangent and other trigonometric values as well as inverse trigonometric functions, supports degree and radian input, and provides a table of special angle values.
Steps
Enter an angle or radian and select the unit → The trigonometric values are displayed automatically; for inverse functions, enter a value and select the function type to get the angle and radian; click the special angle table to apply quickly.
Notes
All calculations run locally in your browser; inverse trigonometric inputs must be within the domain (e.g. asin between -1 and 1); results keep a reasonable number of decimal places.