Sine, Cosine and Tangent - learn with Serlo!

The sine, cosine and tangent functions are the most important trigonometric functions. Sine, cosine and tangent describe the ratio of side lengths in a right triangle depending on one of the acute angles. They are defined as follows.

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Sine, Cosine and Tangent - learn with Serlo!

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Exercises: Sine, Cosine and Tangent on the unit circle - learn with Serlo!