| 单词 | 三角函数 |
| 释义 | 〔trigonometry〕The branch of mathematics that deals with the relationships between the sides and the angles of triangles and the calculations based on them, particularly the trigonometric functions.三角学：数学的分支研究三角形边、角关系以及在此基础上的计算，尤其是三角函数〔Euler〕Swiss mathematician particularly noted for his full development of integral calculus and for his theories of complex numbers, logarithmic and trigonometric functions, and lunar motion.欧拉，莱奥哈尔德：(1707-1783) 瑞士数学家，尤其他对微积分的开创性贡献，以及他的复数、对数、三角函数和月球运动等理论而闻名于世〔cofunction〕The trigonometric function of the complement of an angle:余函数：补角的三角函数： |
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