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- Hyperbolic functions - Wikipedia
Just as the points (cos t, sin t) form a circle with a unit radius, the points (cosh t, sinh t) form the right half of the unit hyperbola Also, similarly to how the derivatives of sin (t) and cos (t) are cos (t) and –sin (t) respectively, the derivatives of sinh (t) and cosh (t) are cosh (t) and sinh (t) respectively
- Hyperbolic Functions - Math is Fun
Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum For K-12 kids, teachers and parents
- Cosh: Definitions and Examples - Club Z! Tutoring
Cosh is defined as the ratio of the adjacent side of a right triangle to the hypotenuse, where the hypotenuse is the distance between the origin and a point on the hyperbola
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