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OpenStudy (anonymous):
If sinhx=8/15, find the values of the other hyperbolic functions at x. Anyone know the formula to this?
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Directrix (directrix):
(coshx)^2 - (sinhx)^2 = 1 (coshx)^2 - (8/15)^2 = 1 (coshx)^2 = 289/225 (coshx) = +/- 17/15 See other equations at the link below: http://www.sosmath.com/trig/hyper/hyper01/hyper01.html
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