Trigonometry Calculator
Calculate sine, cosine, and tangent from an angle in degrees or radians. This page also shows cotangent, secant, and cosecant when defined.
Computes:
sin(θ), cos(θ), tan(θ)
| Function | Value |
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Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
This calculator converts the input angle to radians internally when needed, then evaluates the standard trigonometric functions.
It also reports reciprocal functions when defined:
sec(θ) = 1 / cos(θ),
csc(θ) = 1 / sin(θ),
cot(θ) = cos(θ) / sin(θ)
Examples
- 30° → sin = 0.5, cos ≈ 0.866, tan ≈ 0.577
- π/2 radians ≈ 1.5707963268 → sin = 1, cos ≈ 0
- 45° → sin = cos ≈ 0.7071, tan = 1
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
FAQ
- What does this trigonometry calculator compute?
It computes sine, cosine, and tangent for a given angle in degrees or radians.
- Can I use degrees or radians?
Yes. You can switch between degree mode and radian mode.
- Why can tangent be undefined?
Tangent is undefined where cosine equals 0, such as 90° + 180°k in degree mode.
- What formulas are used?
This page uses the standard trigonometric functions sin(θ), cos(θ), and tan(θ) = sin(θ) / cos(θ).
- Are calculations stored?
No. Everything runs locally in your browser.