Sine Calculator
Calculate the sine of an angle, in degrees or radians.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter an angle (in degrees or radians) to calculate its sine.
Your result
0.5
Sine
AI explanation
Formula
sin(angle), converted to radians first if entered in degreesWorked example
sin(30°)
| Field | Value |
|---|---|
| Angle | 30 |
| Angle unit | degrees |
| Sine | 0.5 |
Assumptions
- Sine is defined for every real angle and always returns a value between -1 and 1.
Frequently asked questions
What is sine?
In a right triangle, sine of an angle is the ratio of the length of the opposite side to the hypotenuse. More generally, it's defined for any angle using the unit circle.
What is sin(90°)?
Sine reaches its maximum value of 1 at 90° (or π/2 radians).
How do I find the angle from a sine value instead?
Use the Inverse Trigonometry Calculator, which computes arcsin (the inverse of sine).