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三角函数

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Inequalities in the proof of college entrance examination, often with the series, conics, trigonometric functions,"Three Second," the number of permutation and combination of combining the answers to questions.

高考中证明不等式问题,常常是与数列、二次曲线、三角函数、"三个二次"、排列组合数等相结合的解答题。

You want to use trigonometric functions, such as sine, cosine, and tangent.

你想要去使用三角函数例如像正弦,余弦和正切

It can get the three-dimensional profile of the object surface effectively. Because of the cragginess of the three-dimensional surface when sine grating is projected the image of the sine grating is modulated and the modulated image is taken by a CCD camera with an angel compared to projecting direction. After the phase shift measuring method, the phase is gotten. Because the phase is calculated by the phase shift measuring ranges from –π to +π it isn't continuous. The phase unwrapping is necessary to recover the continuous phase about the object shape.

这种方法采用结构光照明,将正弦光栅图像投影到被测物体表面,用与投影方向成一定角度的CCD摄像机获取受物体表面面形调制的变形光栅像,根据数字相移算法计算出相位分布,由于从相移计算的相位被截断在反三角函数的主值范围内,因而是不连续的,必须通过相位展开恢复出连续相位分布,由相位-高度关系最终求出物体轮廓的三维数据信息。

Part four will prove the following 4 theorems : theorem 1 :the curvature and torsion of the locus of foot point of the perpendicular line between the origin and the tangent line of the cylindrical spiral remains to be function t , but not trigonometric function t .

第四部分证明四个定理分别为定理1 由坐标系原点至圆柱螺线的切线所引垂线的垂足的轨迹曲率和挠率仍为t的函数,但不是t的三角函数

And its invention entails basic knowledge of trigonometry, Dirac delta function, and Fourier analysis.

发明此函数需要有扎实的工程数学知识,尤其是三角函数, Dirac delta function ,以及傅立叶分析法。

To strengthen the inequality symbol with the training, 2. to expanse the applications of trigonometric functions to polar coordinates and Parameter equation, 3. to adjust Permutation and combinationwith Probability and Statistics, 4.to strengthen applications of Higher Geometry in the Elementary Geometry.

对此问题本文试着从中学数学教学的角度,在以下几个方面进行探讨:1 加强带符号的不等式的训练,2 扩充三角函数在参数方程和极坐标中的应用,3 排列组合与概率统计的调整,4 高等几何在初等几何中的应用。

In the paper,according to homogeneous balance principle and F-expantion method,some double-periodic exact solutions of a fifth-order KdV-like equation with variable coefficients are obtained in form of Jacobi elliptic function .

利用齐次平衡原则和F-展开法,求出了一个五阶变系数KdV-like方程的一些用Jacobi 椭圆函数表示的双周期解。并且在极限的情况下,得到了该方程的孤立波解和三角函数表示的周期波解

The Jacobi elliptic function-like solution and trigonometric function solution of variable coefficient KP equation.

获得了变系数KP方程新的类孤波解、类Jacobi椭圆函数解和三角函数解。

This paper gives a general equivalent infinitesimal of trigonometric functions,and utilizes the equivalentinfinitesimal to make questions become easy.

给出了三角函数的一般形式的等价无穷小,并利用等价无穷小,来简化求极限时繁琐的步骤

The vector has the rich actual background and the widespread application function, it has the algebra and the geometry dual statuses, causes the algebra geometrization, the geometry algebra, has communicated the algebra, the geometry and the trigonometric function, has the good analysis method and the complete structure.

向量具有丰富的实际背景和广泛的应用功能,它具有代数和几何双重身份,使代数几何化、几何代数化,沟通了代数、几何与三角函数,具有良好的分析方法和完整的结构。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。