Mathematics Describing the Real World: Precalculus and Trigonometry

Trigonometric Functions—Right Triangle Definition (1x13)

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The Pythagorean theorem, which deals with the relationship of the sides of a right triangle, is the starting point for the six trigonometric functions. Discover the close connection of sine, cosine, tangent, cosecant, secant, and cotangent, and focus on some simple formulas that are well worth memorizing.