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Asked by Mark R

Why do the ratios of sine and cosine depend upon the angle being a part of a right triangle?
4 years ago

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Answered by oobleck
because that is the way they are defined.
You cannot have a hypotenuse without a right triangle.
Read about the unit circle and the function definitions.
4 years ago
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Why do the ratios of sine and cosine depend upon the angle being a part of a right triangle?

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