Abstract
We have studied four different trigonometric ratios: sine, cosine, tangent, and cotangent. These four are closely related, and it will be helpful to explore their relationships. We have already seen that \( {\sin^2}\alpha + {\cos^2}\alpha = 1 \), for any acute angle α. The following examples introduce us to a number of other relationships.
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© 2001 I.M. Gelfand
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Gelfand, I.M., Saul, M. (2001). Relations among Trigonometric Ratios. In: Trigonometry. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4612-0149-6_3
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DOI: https://doi.org/10.1007/978-1-4612-0149-6_3
Publisher Name: Birkhäuser, Boston, MA
Print ISBN: 978-0-8176-3914-3
Online ISBN: 978-1-4612-0149-6
eBook Packages: Springer Book Archive