共查询到19条相似文献,搜索用时 125 毫秒
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1.本单元知识点三角函数是基本初等函数,它是描述周期现象的重要数学模型.本单元的学习重点包括:三角函数的概念,三角函数的图象与性质,同角三角函数基本关系,三角函数诱导公式,两角和与差的正弦、余弦、正切公式,二倍角的正弦、余弦、正切公式,函数y=Asin(ωx+φ)的图象,三角函数模型的应用.本单元的学习难点包括:三角恒等变换.2.典型例题选讲例1已知tanα=13,求值: 相似文献
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本节课的教学内容是正切函数的图像与性质.是在学生已经掌握了三角函数线的前提下,在学习了正弦函数、余弦函数的图像与性质的基础上,进一步分析和探究正切函数的图像和性质.因为对于函数的研究方法学生已经基本掌握,在实际学习的过程中,学生对通过函数图像研究函数性质的步骤和手段不会感到很陌生. 相似文献
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定义了三种积分表示的两元函数.这些两元函数有伽马函数表示,可以展开为幂级数.在积分符号内展开被积函数,先积分,再求和,也得到级数展开.对比展开系数,就得到一些对数三角函数定积分的值.选取合适的围道,得到其他两类对数三角函数定积分的值. 相似文献
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(1)本单元的学习重点是正弦函数,余弦函数及正切函数的图象和性质;“五点法”作图及图象变换的方法;已知三角函数值求角. 相似文献
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重点:正弦函数图象的作法,正弦函数、余弦函数的图象和性质,求函数y=Asin(ωx+ψ)+B的最小正周期和最大值,正切函数的图象和性质,已知三角函数值求角。 相似文献
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考向1:三角函数的概念、同角诱导公式的简单应用考情聚焦:1.三角函数的定义、同角三角函数的关系及诱导公式的简单应用,在近几年高考中时常出现.2.该类问题出题背景选择面广,易形成知识交汇题.3.多以选择题、填空题的形式出现,属于中、低档题.考向链接:1.三角函数的定义是求三角函数值的基本依据,如果已知角终边上的点,则利用三角函数的定义,可求该角的正弦、余弦、正切值. 相似文献
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全日制普通高级中学数学(必修)第一册(下)第四章《三角函数》共十一节.第一单元[第一节(角的概念的推广)至第五节(正弦、余弦的诱导公式)]及第十一节(已知三角函数值求角)围绕“角的终边”循序展开。因而以“看终边”为学法要点.第二单元[第六节(两角和与差的正弦、余弦、正切)及第七节(二倍角的正弦、余弦、正切)]以“变角更名”为特点。所以“看角与角的关系及三角函数名之间的关系”是学法的要点.第三单元[第八节(正弦函数、余弦函数的图象和性质)至第十节(正切函数的图象和性质)]主要是图象的三种变换。可归结为“看新、旧坐标间的关系及相应的基本三角函数”为学法要点.概括起来,探析三角函数问题应抓住“三个看”. 相似文献
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Djurdje Cvijovi? 《Applied mathematics and computation》2009,215(8):3002-3006
In a recent paper, Adamchik [1] expressed in a closed-form symbolic derivatives of four functions belonging to the class of functions whose derivatives are polynomials in terms of the same functions. In this sequel, simple closed-form higher derivative formulae which involve the Carlitz-Scoville higher order tangent and secant numbers are derived for eight trigonometric and hyperbolic functions. 相似文献
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Claude Gauthier 《Central European Journal of Mathematics》2006,4(3):395-412
We apply a method of Euler to algebraic extensions of sets of numbers with compound additive inverse which can be seen as
quotient rings of R[x]. This allows us to evaluate a generalization of Riemann’s zeta function in terms of the period of a function which generalizes
the function sin z. It follows that the functions generalizing the trigonometric functions on these sets of numbers are not periodic. 相似文献
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EXACT TRAVELING WAVE SOLUTIONS OF MODIFIED ZAKHAROV EQUATIONS FOR PLASMAS WITH A QUANTUM CORRECTION*
In this article,the authors study the exact traveling wave solutions of modified Zakharov equations for plasmas with a quantum correction by hyperbolic tangent function expansion method,hyperbolic seca... 相似文献
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基于一类与给定多边形相切的三角样条曲线,通过在基函数中引入形状参数λ,在保持原曲线的光滑性及其他基本性质不变的条件下,构造出一类能自由调控曲线形态的含参数三角样条曲线,并结合图例讨论了其相关性质. 相似文献
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Bai-Ni Guo Feng Qi 《International Journal of Mathematical Education in Science & Technology》2013,44(3):384-389
By using an identity relating to Bernoulli's numbers and power series expansions of cotangent function and logarithms of functions involving sine function, cosine function and tangent function, four inequalities involving cotangent function, sine function, secant function and tangent function are established. 相似文献
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An infeasible interior-point method (IIPM) for solving linear optimization problems based on a kernel function with trigonometric barrier term is analysed. In each iteration, the algorithm involves a feasibility step and several centring steps. The centring step is based on classical Newton’s direction, while we used a kernel function with trigonometric barrier term in the algorithm to induce the feasibility step. The complexity result coincides with the best-known iteration bound for IIPMs. To our knowledge, this is the first full-Newton step IIPM based on a kernel function with trigonometric barrier term. 相似文献
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In this paper, a series of abundant exact travelling wave solutions is established for a modified generalized Vakhnenko equation by using auxiliary equation method. These solutions can be expressed by Jacobi elliptic function. When Jacobi elliptic functions modulus m→1 or 0, the travelling wave solutions degenerate to four types of solutions, namely, the soliton solutions, the hyperbolic function solutions, the trigonometric function solutions, constant solutions. 相似文献
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We show by example that the classical characterization of the Fourier series of periodic functions in Lp, 1<p≤+∞, as those trigonometric series whose Abel or Fejér means are uniformly bounded in Lp does not hold for general (non-periodic) trigonometric series in relation to Stepanov-almost-periodic functions, but that
it does hold under the additional hypothesis that the means are translation equicontinuous. We exhibit a bounded, infinitely
differentiable function that belongs to every class of Besicovitch-almost-periodic functions but is not equivalent in the
metric of Besicovitch-almost-periodic functions to any Stepanov-almost-periodic function. 相似文献
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本文根据谐波平衡法假设周期解的基本思想,提出了一种分析非线性振动特性的正交函数法。将位移展开为谐波的级数形式,根据线性模态和三角级数的正交性导出了一组形式简单的特征方程。有效地解决了平方非线性系统存在漂移项的困难,算例表明:本文方法精度高,收敛快,工作量小。 相似文献