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This trigonometry & precalculus video provides a basic introduction into the law of sines formula. It explains how to use that formula to find the missing sides and missing angles of a triangle.

Solving Trig Equations - Finding All Solutions:

Solving Trig Equations With Multiple Angles:


Solving Trig Equations With Double Angles:


More Examples - Law of Sines:


Area of an Oblique Triangle:


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The Height of a Triangle - Heron's Formula:


Law of Cosines:


Polar Coordinates:


Polar Equations to Rectangular Equations:


Rectangular Equations to Polar Equations:


How To Graph Polar Equations:


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Complex Numbers - De Moivre's Theorem:


Dot Product of Two Vectors:


Trigonometry Final Exam Review:


Final Exams and Video Playlists:


Full-Length Videos and Worksheets:

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