arcsin(x, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj])

Some inconsistencies with the Dask version may exist.

Inverse sine, element-wise.

Notes

arcsin is a multivalued function: for each x there are infinitely many numbers :None:None:`z` such that $sin(z) = x$ . The convention is to return the angle :None:None:`z` whose real part lies in [-pi/2, pi/2].

For real-valued input data types, arcsin always returns real output. For each value that cannot be expressed as a real number or infinity, it yields nan and sets the :None:None:`invalid` floating point error flag.

For complex-valued input, arcsin is a complex analytic function that has, by convention, the branch cuts [-inf, -1] and [1, inf] and is continuous from above on the former and from below on the latter.

The inverse sine is also known as :None:None:`asin` or sin^{-1}.

Parameters

x : array_like

:None:None:`y`-coordinate on the unit circle.

out : ndarray, None, or tuple of ndarray and None, optional

A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.

where : array_like, optional

This condition is broadcast over the input. At locations where the condition is True, the :None:None:`out` array will be set to the ufunc result. Elsewhere, the :None:None:`out` array will retain its original value. Note that if an uninitialized :None:None:`out` array is created via the default out=None , locations within it where the condition is False will remain uninitialized.

**kwargs :

For other keyword-only arguments, see the ufunc docs <ufuncs.kwargs> .

Returns

angle : ndarray

The inverse sine of each element in x, in radians and in the closed interval [-pi/2, pi/2] . This is a scalar if x is a scalar.

This docstring was copied from numpy.arcsin.

See Also

arccos

arctan

arctan2

cos

emath.arcsin

sin

tan

Examples

This example is valid syntax, but we were not able to check execution

>>> np.arcsin(1)     # pi/2  # doctest: +SKIP
1.5707963267948966

This example is valid syntax, but we were not able to check execution

>>> np.arcsin(-1)    # -pi/2  # doctest: +SKIP
-1.5707963267948966

This example is valid syntax, but we were not able to check execution

>>> np.arcsin(0)  # doctest: +SKIP
0.0

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

dask.array.ufunc.sin dask.array.ufunc.arcsin dask.array.ufunc.arccos

Local connectivity graph

Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.

Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)

SVG is more flexible but power hungry; and does not scale well to 50 + nodes.

All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them

---

File: /dask/array/ufunc.py#None
type: <class 'dask.array.ufunc.ufunc'>
Commit: