explain 
select radians(57.2958) FROM src LIMIT 1;

select radians(57.2958) FROM src LIMIT 1;
select radians(143.2394) FROM src LIMIT 1;

DESCRIBE FUNCTION radians;
DESCRIBE FUNCTION EXTENDED radians;
explain 
select radians(57.2958) FROM src LIMIT 1;

select radians(57.2958) FROM src LIMIT 1;
select radians(143.2394) FROM src LIMIT 1;

DESCRIBE FUNCTION radians;
DESCRIBE FUNCTION EXTENDED radians;