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Trigonometric functions/Arctangent/Definition
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Arctangent
The
inverse function
of the real
tangent function
is
R
⟶
]
−
π
2
,
π
2
[
,
x
⟼
arctan
x
,
{\displaystyle \mathbb {R} \longrightarrow ]-{\frac {\pi }{2}},{\frac {\pi }{2}}[,x\longmapsto \arctan x,}
and is called
arctangent
.
![{\displaystyle \mathbb {R} \longrightarrow ]-{\frac {\pi }{2}},{\frac {\pi }{2}}[,x\longmapsto \arctan x,}](https://wikimedia.org/api/rest_v1/media/math/render/svg/a599a936531a4aaefac1af5be86d23f98e145ce7)
