atan2 - Wikipedia
double atan2(double y, double x) 사용법
c/c++中atan和atan2区别_ieyangxiaoyi的博客-CSDN博客
Optimal C++ solution that uses radians and only duplicates points in quadrant 3 & 4 - LeetCode Discuss
Speeding up `atan2f` by 50x
atan(dy/dx);, atan2( double dy, double dx); , math.h 의 상수 매크로, 프로그램시 계산오류등 정리 : 네이버 블로그
c++】atan2()和atan()函数_杳杳捞到月亮了吗的博客-CSDN博客
Four-quadrant inverse tangent - MATLAB atan2 - MathWorks Deutschland
Speeding up `atan2f` by 50x
mathematics - How does atan2 work when getting angle of a vector? - Game Development Stack Exchange
c# - Shifting angles while using Atan2 - Stack Overflow
atan2 - Wikipedia
c++ - atan2() using two vectors - Stack Overflow
![C/C++] atan2 함수로 각도 구하기 (극 좌표계)](https://t1.daumcdn.net/cfile/tistory/2467434B591445760D "C/C++] atan2 함수로 각도 구하기 (극 좌표계)")
C/C++] atan2 함수로 각도 구하기 (극 좌표계)
math - How to use atan2() in combination with other Radian angle systems - Stack Overflow
Four-quadrant inverse tangent of fixed-point values - MATLAB atan2
小ネタ atan2 | ++C++; // 未確認飛行 C ブログ
C++ atan2
atan2 - Wikipedia
小ネタ atan2 | ++C++; // 未確認飛行 C ブログ
Use atan2 function instead of atan - EasyHack - LibreOffice Development Blog
File:Atan2 circle.svg - Wikimedia Commons
ATAN2
What is the function of a isInteger in Java? - Quora
How to Find a Fast Floating-Point atan2 Approximation - Nic Taylor
