Trigonometry Index
Trigonometry (from Greek trigonon "triangle" + metron "measure")
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images/circle-sine.js
Introduction
Sine, Cosine and Tangent
![trig example 30m at 39 degrees](images/trig-2example2.gif)
- Sine, Cosine and Tangent
- Sohcahtoa
- Sine Graph Exercise
- Graphs of Sine, Cosine and Tangent
- Unit Circle
- Interactive Unit Circle
- Sine, Cosine and Tangent in Four Quadrants
- Small Angle Approximations
- Inverse Sine, Cosine, Tangent
Right Angled Triangles
- Solving Triangles by Reflection
- Finding an Angle in a Right Angled Triangle
- Finding a Side in a Right Angled Triangle
Congruent and Similar
- Congruent Triangles
- Similar Triangles
- How to Find if Triangles are Similar
- Theorems about Similar Triangles
- Mean Proportional
Solving Triangles
- Solving Triangles
- The Law of Sines
- The Law of Cosines
- The Three Angles Add to 180°
- Exterior Angle Theorem
- Solving AAA Triangles
- Solving AAS Triangles
- Solving ASA Triangles
- Solving SAS Triangles
- Solving SSA Triangles
- Solving SSS Triangles
Area
Identities