ATN2 - Query language in Cosmos DB (in Azure and Fabric)

The ATN2 function calculates the principal value of the arctangent of y/x, expressed in radians.

Syntax

ATN2(<numeric_expr_y>, <numeric_expr_x>)

Arguments

	Description
numeric_expr_y	A numeric expression for the y component.
numeric_expr_x	A numeric expression for the x component.

Return types

Returns a numeric expression.

Examples

This section contains examples of how to use this query language construct.

Arctangent for y/x

In this example, the ATN2 function is used to calculate the arctangent for the specified x and y components.

SELECT VALUE {
  arctangentInRadians: ATN2(35.175643, 129.44)
}

[
  {
    "arctangentInRadians": 0.265344532064832
  }
]

Remarks

• This function doesn't utilize the index.