Trigonometry lesson 9 - Definition of sine and cosine using the unit circle

924 views · Published 30 August 2013 · 11:14 · Indexed 20 October 2026

Channel: Magic Monk · 2013 · Education

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In this lesson, we talk about why it is that, for any point on the unit circle, x=cos(theta) and y=sin(theta).

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