| 单词 | inverse functions |
| 释义 | inverse functions If y = f(x) and a function can be found so that x = g(y) , then g(y) is said to be the inverse function of f(x). If y is a trigonometrical function of the angle x, say y = sinx , then x is the inverse trigonometrical function of y, written x = arcsiny or sin-1y. Similarly, the other trigonometrical functions form the inverse trigonometrical functions cos-1y, tan-1y, cot-1y, sec-1y, and cosec-1y. Inverse hyperbolic functions are also formed in this way, e.g. arcsinhy or sinh-1y, cosh-1y, and tanh-1y |
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