angular measure There are two principal ways of measuring angles: by using degrees, in more elementary work, and by using radians, essential in more advanced work, in particular, when calculus is involved.
angular measure
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。