Cool math .com - The Trigonometry of Triangles

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The Trigonometry of Triangles:
Definitions and formulas for basic trigonometry, sine, cosine, tangent, cosecant, secant, cotangent, the law of sines and the law of cosines
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basic trig definitions

Law of Sines

Law of Cosines

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Basic Trigonometric Definitions:

The Law of Sines:

The Law of Cosines: