n.三角形，三角琴，（占星术12宫中隔120度的）三宫之一组

The trigonometric function sine is used to calculate the height of the tower.
三角函数正弦被用来计算塔的高度。
In trigonometry, the cosine of an angle is the ratio of the adjacent side to the hypotenuse in a right-angled triangle.
在三角学中，余弦是一个直角三角形中邻边与斜边的比值。
The sine wave is a fundamental shape in trigonometry, representing periodic oscillations.
正弦波是三角学中的基本图形，代表周期性振荡。
The angle of elevation, determined by trigonometry, helped the surveyor calculate the distance to the mountain peak.
通过三角测量确定的仰角帮助测量员计算到山顶的距离。
Trigonometric ratios help architects design stable structures by understanding the forces at play in different angles.
三角比率帮助建筑师通过理解不同角度的作用力来设计稳定的结构。
The trigonometric identity sin²θ + cos²θ = 1 is a cornerstone of the subject.
三角恒等式sin²θ + cos²θ = 1是该学科的基础。
Using trigonometry, sailors can navigate the open seas by calculating the altitude of the sun or stars.
航海者通过计算太阳或星星的高度，利用三角学在公海上导航。
The tangent of an angle in a right triangle is the ratio of the opposite side to the adjacent side.
直角三角形中一个角的正切值是对边与邻边的比值。
The field of trigonometry has numerous applications, from astronomy to civil engineering.
三角学领域有众多应用，从天文学到土木工程都有涉及。
By applying the principles of trigonometry, engineers can determine the stresses on bridges due to varying angles of force.
工程师通过应用三角学原理，可以计算出由于不同力的作用角度而对桥梁产生的应力。