Defining cos(x) and sin(x) using a unit circle
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YouTubeRadford Mathematics
Defining cos(x) and sin(x) using a unit circle
The sine and cosine functions, sin(x) and cos(x), are defined as the coordinates of a point moving around the circumference of a unit circle. In this video we learn how the values of sinx and cost can in fact be read off a unit circle centred at the origin.
8.4K viewsMar 12, 2018
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