COS

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Compatibility
COS(a)
EngineOKAlternative
ingresYes
mysqlYes
oracleYes
postgresYes
sqlserverYes

COS

COS(f) returns the cosine of f where f is in radians.

  COS(3.14159/3) -> 0.5 
schema:scott
 drop TABLE angle
<source lang=sql class='setup'> create TABLE angle(
  type VARCHAR(10),
  angle INTEGER
  id INTEGER
INSERT INTO angle VALUES (COS,0,1);
INSERT INTO angle VALUES (COS,45,1.732051/2);
INSERT INTO angle VALUES (COS,45,1/1.41421);
INSERT INTO angle VALUES (COS,60,1/2);
INSERT INTO angle VALUES (COS,90,NULL);
INSERT INTO angle VALUES (SIN,0,0);
INSERT INTO angle VALUES (SIN,30,1/2);
INSERT INTO angle VALUES (SIN,45,1/1.41421);
INSERT INTO angle VALUES (SIN,60,1.732051/2);
INSERT INTO angle VALUES (SIN,90,1);
INSERT INTO angle VALUES (TAN,0,0);
INSERT INTO angle VALUES (TAN,30,1/1.732051);
INSERT INTO angle VALUES (TAN,45,1);
INSERT INTO angle VALUES (TAN,60,1.732051);
INSERT INTO angle VALUES (TAN,90,1/0);
<div class='qu'>
In this example you return the cosine of each of the angles.   
<source lang='sql' class='def'>
SELECT id,
       COS(th)
  FROM angle

</div>

See also