“angle”的概念、定义、习题解题方法及翻译-数学辞典

单词

angle

释义

angle

(between lines in the plane) In coordinate geometry of the plane, the angle α between two lines with gradients m1 and m2 is given by

This is obtained from the tan(A−B) formula. In the special cases when m1m2=−1 or when m1 or m2 is infinite, it has to be interpreted as follows: if m1 m2=−1, θ = 90°; if mi is infinite, θ = 90° −|tan−1 mj| where j ≠ i; and if m1 and m2 are both infinite, θ = 0.

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数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。