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hyperbolic function |
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hyperbolic functionIn mathematics, one of a set of functions related to the hyperbola in the same way the trigonometric functions relate to the circle. They are the hyperbolic sine, cosine, tangent, secant, cotangent, and cosecant (written “sinh,” “cosh,” etc.). The hyperbolic equivalent of the fundamental trigonometric identity is cosh2z − sinh2z = 1. The hyperbolic sine and cosine, particularly useful for finding special types of integrals, can be defined in terms of exponential functions: sinhx = (ex − e−x) ÷ 2 and coshx = (ex + e−x) ÷ 2 How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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I kept myself busy with sending out resumes, calling professional contacts, cruising the Internet to look for positions, and coauthoring an essay for the COTH Report about the Allegheny experience. Net sales $ 449,478 $308,892 Cost of sales 284,777 262,908 Depreciation, amortization, and COTH 44,638 42,161 Gross profit 120,063 3,823 Selling and administrative expense 22,810 18,563 Operating income (loss) 97,253 (14,740) |
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