ATAN(Y,X), ATAN2(Y,X) returns the arc tangent of the two variables X and Y. : ATAN « Math Numeric Functions « MySQL Tutorial

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MySQL Tutorial » Math Numeric Functions » ATAN   21. 6. 2. ATAN(Y,X), ATAN2(Y,X) returns the arc tangent of the two variables X and Y. mysql> mysql> mysql> SELECT ATAN(-2,2); +-------------------+ | ATAN(-2,2)        | +-------------------+ | -0.78539816339745 | +-------------------+ 1 row in set (0.00 sec) mysql> SELECT ATAN2(PI(),0); +-----------------+ | ATAN2(PI(),0)   | +-----------------+ | 1.5707963267949 | +-----------------+ 1 row in set (0.00 sec) mysql> 21. 6. ATAN 21. 6. 1.  ATAN(X) returns the arc tangent of X 21. 6. 2.  ATAN(Y,X), ATAN2(Y,X) returns the arc tangent of the two variables X and Y.

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