$sinhReturns the hyperbolic sine of a value that is measured in radians.
$sinhhas the following syntax:{ $sinh: <expression> }$sinhtakes any valid expression that resolves to a number, measured in radians. If the expression returns a value in degrees, use the$degreesToRadiansoperator to convert the value to radians.By default
$sinhreturns values as adouble.$sinhcan also return values as a 128-bit decimal if the<expression>resolves to a 128-bit decimal value.For more information on expressions, see Expressions.
Behavior
null, NaN, and +/- Infinity
If the input argument resolves to a value of null or refers to a field that is missing, $sinh returns null. If the argument resolves to NaN, $sinh returns NaN. If the argument resolves to negative or positive Infinity, $sinh returns negative or positive Infinity respectively.
Example | Results |
|---|---|
|
|
|
|
|
|
|
|
Example
The following trigonometry collection contains a document that stores an angle value measured in degrees:
db.trigonometry.insertOne( { "_id" : ObjectId( "5c50782193f833234ba90d25" ), "angle" : Decimal128( "53.1301023541559787031443874490659" ) })The following aggregation operation uses the $sinh expression to calculate the hyperbolic sine of angle and adds it to the input document using the $addFields pipeline stage:
db.trigonometry.aggregate( [ { $addFields : { "sinh_output" : { $sinh : { $degreesToRadians : "$angle" } } } }] )The $degreesToRadians expression converts the angle in degrees to radians.
Example output:
{ "_id" : ObjectId("5c50782193f833234ba90d25"), "angle" : Decimal128("53.1301023541559787031443874490659"), "sinh_output" : Decimal128("1.066020404405732132503284522731829")}Because angle is stored as a 128-bit decimal, the $sinh output is also a 128-bit decimal.
The following trigonometry collection contains a document that stores an angle value measured in radians:
db.trigonometry.insertOne( { "_id" : ObjectId( "5c50782193f833234ba90d35" ), "angle" : Decimal128( "1.6301023541559787031443874490659" ) })The following aggregation operation uses the $sinh expression to calculate the hyperbolic sine of angle and adds it to the input document using the $addFields pipeline stage:
db.trigonometry.aggregate( [ { $addFields : { "sinh_output" : { $sinh : "$angle" } } }] )Example output:
{ "_id" : ObjectId("5c50782193f833234ba90d35"), "angle" : Decimal128("1.6301023541559787031443874490659"), "sinh_output" : Decimal128("2.454243813557362033961729701069671")}Because angle is stored as a 128-bit decimal, the $sinh output is also a 128-bit decimal.