Difference between revisions of "Arctan"

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The $\mathrm{arctan}$ function is the inverse function of the [[tangent]] function.<br />
 
The $\mathrm{arctan}$ function is the inverse function of the [[tangent]] function.<br />
  
 
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<gallery>
File:Arctan.png|Graph of $\mathrm{arctan}$ on $[-1,1]$.
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File:Arctanplot.png|Graph of $\mathrm{arctan}$ on $[-20,20]$.
File:Complexarctanplot.png|[[Domain coloring]] of $\mathrm{arctan}$ on $[-2,2] \times [-2,2] \subset \mathbb{C}.$
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File:Complexarctanplot.png|[[Domain coloring]] of $\mathrm{arctan}$.
 
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=Properties=
 
=Properties=
{{:Derivative of arctan}}
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[[Derivative of arctan]]<br />
 
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[[Antiderivative of arctan]]<br />
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[[Relationship between arctan and arccot]]<br />
<strong>Proposition:</strong>  
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[[2F1(1/2,1;3/2;-z^2)=arctan(z)/z]]<br />
$\displaystyle\int \mathrm{arctan}(z) = z\mathrm{arctan}(z) - \dfrac{1}{2}\log(1+z^2)+C$
 
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<strong>Proof:</strong> █
 
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<strong>Proposition:</strong>
 
$\mathrm{arctan}(z) = \mathrm{arccot}\left( \dfrac{1}{z} \right)$
 
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<strong>Proof:</strong> █
 
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{{:Relationship between arctan and hypergeometric 2F1}}
 
  
 
=References=
 
=References=
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[[Arctanh]]  
 
[[Arctanh]]  
  
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[[Category:SpecialFunction]]

Latest revision as of 02:46, 16 September 2016

The $\mathrm{arctan}$ function is the inverse function of the tangent function.

Properties

Derivative of arctan
Antiderivative of arctan
Relationship between arctan and arccot
2F1(1/2,1;3/2;-z^2)=arctan(z)/z

References

Weisstein, Eric W. "Inverse Tangent." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/InverseTangent.html

See Also

Tangent
Tanh
Arctanh

Inverse trigonometric functions