Calculates the inverse trigonometric sine function (arcsine). Angle units are in radians. The function is defined for complex values. Phase of a complex number is evaluated between - π and π . If x is complex, or abs(x) > 1, the following equation is used:
$$ \text{arcsin(x)} = -i\text{ln(ix+}\sqrt{1-x^2}) $$
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Syntax |
Description |
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out = asin(x); |
Returns the complex arcsine of x. |
Example
Calculate asin( π /4 + i).
x=pi/4+1i; ?asin(x); result: 0.537282+0.992724i
See Also