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TRIGONOMETRY
Trigonometry is a branch of mathematics that studies relationships involving lengths and angles of triangles.
The term "Trigonometry" derives from Greek "trigonometria", meaning triangle measuring. This term first used by Bartholomaeus Pitiscus.
 The Trigonometric Table |  World of Trigonometry |  Funny Trigonometric Relation |
|---|---|---|
 Formulas |  Triangles and Trigonometry |  Trigonometry in real life |
 Trigonometric Circle |  Formulas |  Sine, Cosine and Tangent |
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