sec function
Applies to: 
Databricks SQL Databricks Runtime 10.1
Returns the secant of expr.
Syntax
sec(expr)
Arguments
expr: An expression that evaluates to a numeric expressing the angle in radians.
Returns
A DOUBLE.
sec(expr) is equivalent to 1 / cos(expr)
Examples
SQL
> SELECT sec(pi());
-1.0
> SELECT sec(0);
1.0