ATN2

Description

Function that returns the arctangent in radians of two coordinates sent as a parameter (ATN2 in Transact-SQL).

For $z = tan^{-1}(x, y)$: - Range: $-\pi\leqslant z \leqslant \pi$ or $-180^{\circ}\leqslant z \leqslant 180^{\circ}$ - Domain: $\mathbb{R}$

Sample Source Pattern

Syntax

ATN2( expression_1, expression_2 )

Arguments

expression1and expression2: Numeric expressions.

Return Type

Numeric expression between $-\pi$ and $\pi$.

Examples

Query

SELECT ATN2(7.5, 2);

Result

ATN2(7.5, 2)      |
------------------+
1.3101939350475555|