Warning: file_put_contents(/www/wwwroot/ppbbu/52065.com/cache/d07d7022e65cea1664ac568ee94fce75.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/52065.com/index.php on line 55 arctan英英字典_arctan剑桥英语解释_arctan柯林斯英文解释_伍贰汉英词典
1. ABBREVIATION for arctangent: the function the value of which for a given argument is the angle in radians (between –π/2 and π/2) the tangent of which is that argument: the inverse of the tangent function 反正切