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What's the difference between atan(y/x) and atan2(y,x) ?

Posted Jul 14, 2011, 12:36 p.m. EDT Version 4.1, Version 4.4 2 Replies

Xiaoyi Yu
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What's the difference between atan(y/x) and atan2(y,x) ?
2 Replies Last Post Aug 12, 2014, 4:56 p.m. EDT
Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago Jul 14, 2011, 9:47 p.m. EDT
atan2 is the 4 quadrants version of atan as the documentation states. It should therefore give different results for atan2(X,Y) and atan2(-X,-Y). It can also handle the case where X=0.

Nagi Elabbasi
Veryst Engineering
atan2 is the 4 quadrants version of atan as the documentation states. It should therefore give different results for atan2(X,Y) and atan2(-X,-Y). It can also handle the case where X=0. Nagi Elabbasi Veryst Engineering
Nitzan Livneh
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Posted: 1 decade ago Aug 12, 2014, 4:56 p.m. EDT
wikipedia knows best:
en.wikipedia.org/wiki/Atan2
wikipedia knows best: http://en.wikipedia.org/wiki/Atan2

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