How to evaluate sine, cosine, tangent by hand (radians) | Math Hacks
Автор: Math Hacks
Загружено: 2019-02-20
Просмотров: 19211
Brett shows you how to find the exact values of sine, cosine, and tangent at a given radian measure by using special right triangles to locate the corresponding point on the Unit Circle, without any reference material. Learn how to locate reference angles, negative angles, and angles larger than 2pi radians. She also shows you helpful tricks and memory aids to help you along the way!
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How to evaluate cosecant, secant, and cotangent value by hand (radians) » • Evaluate secant, cosecant, cotangent (radi...
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SKIP AHEAD
Problem 1: Evaluate Sin(0), Cos(0), Tan(0) by hand » 0:52
Problem 2: Evaluate Cos(3pi/4) using 45-45-90 right triangle » 6:13
Problem 3: Evaluate Sin(7pi/6) using 30-60-90 right triangle » 13:17
Problem 4: Evaluate a negative radian / undefined example: Tan(-pi/2) » 21:22
Problem 5: Evaluate an angle larger than 2pi: Tan(11pi/3) » 24:29
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