Returns the tangent (Tan) of angleInRadians.
Tan ( angleInRadians )angleInRadians - any numeric expression or field containing a numeric expression, in radians
number
FileMaker Pro 6.0 or earlier
Use this function to calculate the Tan of angleInRadians.

•With the Tan function, you cannot use values exactly equal to 90 degrees (Pi/2 radians), or multiples of 90 degrees.
Tan(.13) returns .13073731....
Tan(Radians(34)) returns .6745085.