inverse cosine

The results show that backward electron emission yield deviates from inverse cosine law, due to the role of the valence electrons of H2+.

研究发现背向的电子发射产额不满足余弦关系，这是由于H2+上的价电子所引起的。

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。

This paper presents a new Loeffler algorithm-based approach to two dimensional forward and Inverse Discrete Cosine Transform ( 2D DCT/ IDCT) for image compressions.

提出了一种基于Loeffler[8]算法的快速实现二维离散余弦变换/反离散余弦变换（2D DCT/IDCT）的方法。

Computing the Inverse Transform of Some Common Signal Waveforms(ⅱ) The Inverse Transform of Triangular Wave with Even-Odd Symmetry and Rectifying Cosine Wave

几种常见信号波形的逆变换计算（Ⅱ）奇偶对称三角波与锯齿波和整流余弦波的逆变换