In order to comprehend cognitive condition of the ninth-grade students who understand the cacute-angle-trigonometric function, in this paper, the following three areas are researched: 1.
锐角三角函数是九年级学生在学习了函数概念以及反比例函数、一次函数、二次函数之后学习的又一种形式的函数,为了了解九年级学生对锐角三角函数的认知情况,本文从以下三个方面进行分析研究:一、九年级学生对锐角三角函数概念的认知;二、九年级学生对锐角三角函数的认知困难及原因分析;三、根据前面的分析提出教学建议。
Several Inequalities Involving Medians and Angle-Bisectors of Acute Triangles;
锐角三角形中线与角平分线的几个不等式
On a Weighted Inequality for the Side of an Acute Triangle;
关于锐角三角形边长的一个加权不等式
A difference replacement demonstration of the geometric inequalities of acute triangle and the corresponding application program
锐角三角形几何不等式的差分代换证法及应用程序
a triangle whose interior angles are all acute.
内角均为锐角的三角形。
grinding angle (=wedge angle,sharpness angle,tooth angle)
锐度角,研磨角,楔角
THREE SOLUTION THEOREMS AND ACUTE ANGLE PRINCIPLE FOR NONLINEAR OPERATOR EQUATIONS
非线性算子方程的三解定理与锐角原理
a journalist with an infallible nose for a story
触角敏锐的新闻记者.
He rounded off the sharp corners with a file.
他用锉把锐角磨圆。
all-paved branch
全铺分支, 全铺锐角交叉
Ice has difficulty in negotiating sharp corners.
冰很难越过尖锐的角隅。
This is a right angle; that is a sharp angle.
这是一个直角，那是一个锐角。
Designating angles less than90=.
锐角的表示小于90°度角的
DA triangle with one90° angle is a right triangle.
一个角为90°的三角形是直角三角形。
Ascending Triangle
上升三角形、平顶三角形
triangular diagram
三角形图解,三角图
triangular pediment
成等边三角形的三角墙
undersea delta
潜三角洲, 水下三角洲
the trigonometry of spherical triangles.
球面三角形的三角学。