math - How to use atan2() in combination with other Radian angle systems - Stack Overflow
atan2 - Wikipedia
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Speeding up `atan2f` by 50x
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atan2 - Wikipedia
Speeding up `atan2f` by 50x
atan2 - Wikipedia
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atan2 - Wikiwand
atan2 - Wikipedia
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atan2 - Wikipedia
