iarray.IArray.arctan#

IArray.arctan()#

Trigonometric inverse tangent, element-wise.

The inverse of tan so that, if \(y = \tan(x)\), then \(x = \arctan(y)\).

Parameters

iarr(self) (IArray container) – Input array.

Returns

angle – A lazy expression that must be evaluated via out.eval(), which will compute the angles in radians, in the range \(\left[-\frac{\pi}{2}, \frac{\pi}{2}\right]\).

Return type

iarray.Expr

Notes

arctan is a multi-valued function: for each x there are infinitely many numbers \(z\) such that \(\tan(z) = x\). The convention is to return the angle \(z\) whose real part lies in \(\left[-\frac{\pi}{2}, \frac{\pi}{2}\right]\).

References

np.arctan