5: Trigonometry and Right Triangles
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Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles. A right triangle or right-angled triangle is a triangle in which one angle is a right angle. The relation between the sides and angles of a right triangle is the basis for trigonometry.
- 5.1: The Trigonometric Functions
- Trigonometry (from Greek words meaning triangle-measure) is the branch of mathematics concerned with computing unknown sides and angles of triangles.
- 5.3: Applications of Trigonometry
- Trigonometry has many applications in science and engineering. In this section we will present just a few examples from surveying and navigation.
Thumbnail: The sine and cosine function in the unit circle. (CC0; Stephan Kulla via Wikipedia)