# Category:Trigonometry

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**Trigonometry** (from the Greek *trigonon* = three angles and *metro* = measure) is a branch of mathematics dealing with angles, triangles and **trigonometric functions** such as **sine**, **cosine** and **tangent**. It has some relationship to geometry, though there is disagreement on exactly what that relationship is; for some, trigonometry is just a subtopic of geometry.

## Subcategories

This category has the following 6 subcategories, out of 6 total.

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### I

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## Pages in category "Trigonometry"

The following 97 pages are in this category, out of 97 total. This list may not reflect recent changes (learn more).

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### C

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- Tangent half-angle formula
- Trigonometric constants expressed in real radicals
- Trigonometric functions
- Trigonometric functions of matrices
- Proofs of trigonometric identities
- Trigonometric integral
- Trigonometric interpolation
- Trigonometric number
- Trigonometric polynomial
- Trigonometric substitution
- Trigonometric tables

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