复数算术推导了正弦，余弦的加法公式。
We derive the addition formulas for sine and cosine from the arithmetic of complex numbers.
我们还可以通过解出式中余弦的方法，得到两向量间的角度。
And, we can use that to measure angles between vectors by solving for cosine in this.
其多项式系数又表示为入射角的余弦的另一个羃级数。
The polynomial coefficients are expressed as another power series of cosine of incident angle.
这种方法有节制的信号分解成一系列的波形正弦和余弦的组成部分。
This method decomposes a measured signals waveform into a series of sine and cosine components.
单击文档中含有要计算其反余弦的值的单元格。您也可以将单元格引用键入下框中。
Click the cell in your document that contains the value for which you want to find the arcosine. You can also type the cell reference into the box below.
方法将色谱指纹图谱看作多维空间内的向量，利用向量夹角余弦的基本公式计算两个指纹图谱间的相似度；
METHODS Chromatogram can be treated as vector of hyperspace, and the similarity between them can be counted according to vectorial angle formula.
将HPLC指纹图谱看作多维空间内的向量，利用向量夹角余弦的基本公式计算两个指纹图谱间的相似度。
HPLC curves was treated as vector of hyperspace, the similarity between them was calculated by using the cosine value of the Angle between them.
例如，清单3展示了一个样式表，它生成角度的正弦、余弦和正切值。
For example, Listing 3 shows a stylesheet that generates sines, cosines, and tangents for the angles.
通过矢量，开发人员可以使用各种指标(比如说曼哈顿距离、欧氏距离或余弦相似性)来计算两个项目之间的距离。
Given the vectors, one can calculate the distance between two items using measures such as the Manhattan distance, Euclidean distance, or cosine similarity.
title可以缩写为t，正如我们对余弦曲线的设置。
The title can be abbreviated to t, as we do for the cosine curve.
下面是简单说明的multiplot，它绘制正弦、余弦及其各自倒数的曲线图。
Here is a simple annotated multiplot that plots the sine, cosine, and their respective reciprocals.
此外，一个粗略的正弦曲线图表可以在每天或每年的平均每日温度平面图表中看到，虽然这个图形可能和倒置的余弦波看起来很像。
Also, a rough sinusoidal pattern can be seen in plotting average daily temperatures for each day of the year, although the graph may resemble an inverted cosine wave.
加、乘、余弦等的相互组合能产生任何我们可以想到的数学方程。
Add, multiply, cosine, etc., can be combined to generate any mathematical equation we can think of.
好的，让我们试着把等式，带入正弦函数，或者余弦数来做，你喜欢哪个都行。
All right. Let's try to substitute in that equation a sinusoid's or a cosine solution, whichever one you prefer.
于是余弦定理从此不再是一个纯粹的初等几何问题。
Then cosine theorem is no longer a pure problem from elementary geometry.
在绘图中，您可以使用background来清除显示，然后计算发射方向的余弦值。
In draw, you use background to clear the display, and then calculate the direction cosines for the orientation of the cannon.
特别地，能得到α角的余弦值，我们知道如何找两向量的夹角。
In particular,cosine of alpha,I can get, well, we know how to find the angle between two vectors.
了解如何通过增加正弦和余弦来制造各种不同形状的波。
Learn how to make waves of all different shapes by adding up sines or cosines.
提出了同轴度误差的数学模型，其中给出一种高效的优化方法一余弦移位相加法。
The mathematic model of concentricity error and a advanced optimal method - "cosine shift plus" are put forward.
本文提出了一种离散余弦变换电路VLSI实现的可测试性设计。
In this paper, a VLSI implementation method of design-for-testability for DCT is presented.
计算数值的双曲余弦值。！任意实数。！
Returns the hyperbolic cosine of a number! Is any real number !
本文分析了非仅用余弦函数表达活塞环径向压力分布的方式及有关这种表达式的特性。
The expressions of radial pressure distribution on the piston rings with non- cosine function and their characteristics are studied in detail in this paper.
伏特量交流电路中电压与电流的有效值以及电流与电压之间相位角的余弦之乘积。
The product of the effective values of the voltage and current with the cosine of the phase Angle between current and voltage in an alternating-current circuit.
对于给定的细节较少的单色数字图象，本文给出了一种自适应的离散余弦变换(DCT)数据压缩方法。
For a given monochrome digital image with low detail, an adaptive DCT data compression method is given and compared with adaptive DPCM method.
结果表明该滤波器的透射光谱是余弦函数调制后的光纤光栅反射光谱。
It was found that the transmission spectrum of the filter is the cosine function modulated reflection spectrum of the fiber grating.
一个数学函数，返回指定表达式中以弧度表示的指定角的三角余弦。
Is a mathematical function that returns the trigonometric cosine of the specified Angle, in radians, in the specified expression.
本文提出方向余弦矩阵正交化的一种新方法——解析正交化。
This paper presents a new method named "Analytic Orthogonalization", for orthogonalizing direction cosine matrix.
利用余弦型的复合光栅作为滤波器，在相干光处理系统中可对图像进行微商。
Pattern differentiation can be performed in a coherent Optical processing system if a composite sinusoidal grating is used as a filter.
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.
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