numpy.emath.arcsin#
- emath.arcsin(x)[source]#
Compute the inverse sine of x.
Return the “principal value” (for a description of this, see
numpy.arcsin
) of the inverse sine of x. For real x such that abs(x) <= 1, this is a real number in the closed interval \([-\pi/2, \pi/2]\). Otherwise, the complex principle value is returned.- Parameters:
- xarray_like or scalar
The value(s) whose arcsin is (are) required.
- Returns:
- outndarray or scalar
The inverse sine(s) of the x value(s). If x was a scalar, so is out, otherwise an array object is returned.
See also
Notes
For an arcsin() that returns
NAN
when real x is not in the interval[-1,1]
, usenumpy.arcsin
.Examples
>>> np.set_printoptions(precision=4)
>>> np.emath.arcsin(0) 0.0
>>> np.emath.arcsin([0,1]) array([0. , 1.5708])