The electric field and capacitance of a confocal elliptic capacitor are calculated by the inverse hyperbolic cosine analytic function, and discussion on them is performed.
利用解析函数的性质，通过反双曲余弦计算出了由共焦点椭圆导体柱面组成的电容器内电场和单位长度的电容，并对结果作了进一步讨论。
The inverse function of that restricted cosine function is called the arccosine function.
被限定的余弦函数之反函数叫做反余弦函数。
The inverse function of that restricted cosine function is called the arccosine function.
被限定的余弦函数之反函数叫做反余弦函数。
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