# iarray.arcsin#

iarray.arcsin(iarr: IArray)#

Trigonometric inverse sine, element-wise.

The inverse of sin so that, if $$y = \sin(x)$$, then $$x = \arcsin(y)$$.

Parameters

iarr(self) (IArray container) – y-coordinate on the unit circle.

Returns

angle – A lazy expression that must be evaluated via out.eval(), which will compute the inverse sine of each element in $$x$$, in radians and in the closed interval $$\left[-\frac{\pi}{2}, \frac{\pi}{2}\right]$$.

Return type

iarray.Expr

Notes

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

References

np.arcsin