Trigonometry Calculator (Sin/Cos/Tan) Online – Calculate Sine, Cosine, and Tangent values instantly with our free mobile-friendly Trigonometry Calculator. Convert Degrees and Radians easily.
Trigonometry Calculator
What is Trigonometry?
Trigonometry is a branch of mathematics that studies the relationships between the side lengths and angles of triangles. It is fundamental in fields ranging from architecture and engineering to astronomy and video game development.
Understanding Sin, Cos, and Tan
The three main trigonometric functions are Sine, Cosine, and Tangent. These are often calculated using a right-angled triangle. A common mnemonic to remember the formulas is SOH CAH TOA.
- Sine (sin): Opposite / Hypotenuse (SOH)
- Cosine (cos): Adjacent / Hypotenuse (CAH)
- Tangent (tan): Opposite / Adjacent (TOA)
Definitions
HypotenuseThe longest side of a right-angled triangle, opposite the right angle.OppositeThe side opposite the angle you are calculating.AdjacentThe side next to the angle (that is not the hypotenuse).
Trigonometry Calculation Examples
Here are a few common examples of trigonometric values calculated in degrees:
| Angle (°) | Sin | Cos | Tan |
|---|---|---|---|
| 0° | 0 | 1 | 0 |
| 30° | 0.5 | 0.866 | 0.577 |
| 45° | 0.707 | 0.707 | 1 |
| 60° | 0.866 | 0.5 | 1.732 |
| 90° | 1 | 0 | Undefined |
How to use this Calculator
Simply enter the angle value in the input box above. Select whether your angle is in Degrees or Radians using the dropdown menu, and click "Calculate." The tool will instantly generate the Sine, Cosine, and Tangent values.