Abstract
Definition: For any acute angle α, we draw a right triangle that includes α. The sine of α, abbreviated sin α, is the ratio of the length of the leg opposite this angle to the length of the hypotenuse of the triangle.
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© 2001 I.M. Gelfand
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Gelfand, I.M., Saul, M. (2001). Trigonometric Ratios in a Triangle. In: Trigonometry. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4612-0149-6_2
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DOI: https://doi.org/10.1007/978-1-4612-0149-6_2
Publisher Name: Birkhäuser, Boston, MA
Print ISBN: 978-0-8176-3914-3
Online ISBN: 978-1-4612-0149-6
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