arcsin(x)
Return the "principal value" (for a description of this, see :None:None:`numpy.arcsin`) of the inverse sine of x. For real x such that :None:None:`abs(x) <= 1`, this is a real number in the closed interval $[-\pi/2, \pi/2]$
. Otherwise, the complex principle value is returned.
For an arcsin() that returns NAN
when real x is not in the interval [-1,1]
, use :None:None:`numpy.arcsin`.
The value(s) whose arcsin is (are) required.
The inverse sine(s) of the x value(s). If x was a scalar, so is :None:None:`out`, otherwise an array object is returned.
Compute the inverse sine of x.
>>> np.set_printoptions(precision=4)
>>> np.emath.arcsin(0) 0.0
>>> np.emath.arcsin([0,1]) array([0. , 1.5708])See :
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