trigonometric ratio
trigonometric ratio 双语例句
Mathematics: Understands and applies basic and advanced properties of the concepts of geometry; Use the Pythagorean theorem and its converse and properties of special right triangles to solve mathematical and real-world problems; Understands the basic concepts of right triangle trigonometry (e. g., basic trigonometric ratios such as sine, cosine, and tangent Uses trigonometric ratio methods to solve mathematical and real-world problems (e. g., determination of the angle of depression between two markers on a contour map with different elevations Uses properties of and relationships among figures to solve mathematical and real-world problems e. g., uses the property that the sum of the angles in a quadrilateral is equal to 360 degrees to square up the frame for a building; uses understanding of arc, chord, tangents, and properties of circles to determine the radius given a circular edge of a circle without the center
数学：理解和应用几何概念的初级和高级特性；用毕德哥拉斯定理、逆定理以及特殊直角三角形性质解决数学的和现实世界的问题；理解基本的直角三角形三角比；运用三角比方法解决数学的或现实的问题。（等高线图上的两个标记之间的俯角确定）运用形体之间的关系及其属性解决数学的或现实的问题（利用四边形内角和等于360度来为建筑物框架取正，运用弧，弦，切线和圆的性质确定缺少中心的一段圆弧的圆心
40% of students do not understand the fact of trigonometric functions - an acute angle corresponds to a ratio of the sides.
有40%的学生不理解锐角三角函数的本质&锐角与边的比值的对应关系。
The amplitude ratio is N polynomial of the frequency offset, and the complex amplitude correction factor has N polynomial as well as trigonometric function. So it gets a lot of calculated amount.
由于加窗插值FFT算法得出的幅值比是频率偏移量的N次多项式，同时复振幅的修正系数中不仅含有频率偏移量的N次多项式还有三角函数，计算量很大。
trigonometric ratio
相关单词辨析
proportion: （两件事物之间的）比，比例, 通常用于各种成分或分配额的比例等；
rate: 常用于表示速率，利率，出生率，死亡率，兑换率等；
ratio: （表示两个数量之间关系的）比，比例, in direct/inverse ratio to 成正比/反比
percentage: 百分比，百分率；