TAN
Returns the tangent of an angle given in radians.
PostgreSQL 17.9
TAN(angle)- angle
- Angle in radiansdouble precision
Return value
A floating-point number (double precision) of any sign
Examples
Tangent of a 45° angle
PostgreSQL 17.9
SELECT TAN(PI() / 4);Tangent of a right angle
PostgreSQL 17.9
SELECT TAN(PI() / 2);Details
For an angle in degrees, use TAND.
The result is approximate: for a right angle you get a very large number instead of an error.