$tan (aggregation)
$tan
New in version 4.2.
Returns the tangent of a value that is measured in radians.
$tan
has the following syntax:{ $tan: <expression> } $tan
takes any valid expression that resolves to a number. If the expression returns a value in degrees, use the$degreesToRadians
operator to convert the result to radians.By default
$tan
returns values as adouble
.$tan
can 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
null
, NaN
, and +/- Infinity

If the argument resolves to a value of null
or refers to a field
that is missing, $tan
returns null
. If the
argument resolves to NaN
, $tan
returns NaN
.
If the argument resolves to negative or positive infinity,
$tan
throws an error.
Example | Results | |||
---|---|---|---|---|
{ $tan: NaN } | NaN | |||
{ $tan: null } | null | |||
or
| Throws an error message resembling the following formatted output:
|