$asin (aggregation)
$asinNew in version 4.2.
Returns the inverse sine (arc sine) of a value.
$asinhas the following syntax:{ $asin: <expression> } $asintakes any valid expression that resolves to a number between-1and1, e.g.-1 <= value <= 1.$asinreturns values in radians. Use$radiansToDegreesoperator to convert the output value from radians to degrees.By default
$asinreturns values as adouble.$asincan also return values as a 128-bit decimal as long as the<expression>resolves to a 128-bit decimal value.For more information on expressions, see Expressions.
Behavior
If the argument resolves to a value of null or refers to a field
that is missing, $asin returns null. If the
argument resolves to NaN, $asin returns NaN.
If the argument resolves to a value outside the bounds of
[-1, 1] inclusive, $asin throws an error.
Example | Results | |||
|---|---|---|---|---|
{ $asin: NaN } | NaN | |||
{ $asin: null } | null | |||
or
| Throws an error message resembling the following formatted output: |