The hyperbolic trigonometric functions are to hyperbolae as the trigonometric functions are to circles. That is, imagine you plot these points on a Cartesian plane for all possible values of t.

双曲三角函数就是对曲线应用三角函数，也就是说，想象将这些点放在笛卡尔平面上来得到t的所有可能值。

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In this paper, several new random sampling methods that avoid the calculation of trigonometric and all other complicated functions are developed.

在本文中，设法避开计算三角函数和任何其他复杂函数的一些新的随机抽样方法被提出来了。

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The processing of cone, and puts forward a set of simple method and trigonometric functions, and form, show the actual operation of possibilities.

对圆锥面的加工，提出了一套简单易行的要领，并以三角函数，和表格举行论证，展现着实际操作时的应用大概性。

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