Atan

基本解释

The atan() function returns the arctangent of a number as a numeric value between -PI/2 and PI/2 radians.
函数的作用是：返回一个指定数值参数的反正切值。
The group's executive director, Rosemary Feal,says the number of Romansenrollments areisnow atan historic high.
该学会的执行理事RF发言称，目前语言学习登记的数量已达到一个新的历史高度。
AtAn extremely low body temperature can cause the heart to beat so slowly that a pulse may be difficult to find.
非常低的体温会造成心跳非常缓慢，心电图发现。
Data that has relevjce for managerial decisions is accumulating atan incredible rate due to a host of technological ydvances.
由于科技的发展，导致与管理决策相关的资料，正以一种惊人的速度被不断累积。
Papilio Memnon with both female and male parts was discovered on Monday local time, at the Butterfly Park on Sentosa Island, the daily reported senior curator Ithnine Atan as saying.
海峡时报报道：世界上第一只雌雄同体的人工培育蝴蝶，在新加坡的自然公园被发现。