1.
Proof of an identity involving Catalan triangle number
关于Catalan三角数的一个恒等式的证明
2.
The Enumeration of Catalan Triangulation on Mobius Strip;
Mobius带上Catalan三角剖分的计数
3.
Combinatorial Proofs of Some q-Series Identities Related to the Catalan Recurrence Relation
与Catalan递归式相关的一些q-级数恒等式的组合证明
4.
The trigonometric functions are defined for right triangles.
三角函数是对直角三角形定义的。
5.
the mathematics of triangles and trigonometric functions.
三角形与三角函数的数学。
6.
A Kind of Novikov Algebras and Triangle Functions;
一类Novikov代数与三角函数
7.
scalene triangle
ph.1. 【数】不等边三角形,不规则三角形
8.
The reciprocal of the tangent of an angle in a right triangle.
余切直角三角形中角的正切的倒数
9.
The reciprocal of the sine of an angle in a right triangle.
余割直角三角形中一个角正弦的倒数
10.
trigonal hybrid orbital
正三角形杂化轨函数
11.
Jordan Maps of Triangular Banach Algebras;
三角Banach代数上的Jordan映射
12.
Ore Extensions of Quasitriangular Hopf Algebras
拟三角Hopf代数的Ore-扩张
13.
The trigonometric terms should be changed by the substitution of the equations involving the double angles.
用倍角公式代换三角函数项。
14.
The Properties for Triangles of Which Sides or Interior Angles are Equiratio Sequences;
边或内角成等比数列的三角形的性质
15.
The deformation and applications of sin~2α+cos~2α=1;
同角三角函数平方关系的变形与应用
16.
(mathematics) of a triangle having three sides of different lengths.
（数学）有三条长度不等的边的三角形。
17.
function of an angle expressed as a ratio of the sides of right-angled triangle containing the angle.
直角三角形各角的函数是用各边的比来表示的。
18.
Quantum Communicative Algebra over Weak Quasitriangle Hopf Algebras;
弱拟三角Hopf代数上的量子交换代数