tan()

Returns the tangent of an angle specified in radians.

Syntax

Parameters

RADIAN_EXPR

An angle in radians. Must be a numeric type.

Description

The tan() function returns the tangent of the angle specified in radians by RADIAN_EXPR as a 64-bit double. Internally uses Math.tan().

Returns null if RADIAN_EXPR is null or not a numeric type.

To use degree values, convert to radians first using the form degrees * 3.14159 / 180.

Error codes

N/A

Usage examples

1. Calculate the tangent of 0 radians.

   json "{}" | eval t = tan(0)
   | # t: 0.0
   

2. Convert an angle in degrees to radians and calculate the tangent.

   json "{}" | eval t = tan(45 * 3.14159 / 180)
   | # t: 0.9999996732051289
   

3. A non-numeric value returns null.

   json "{}" | eval t = tan("0")
   | # t: null
   

4. NULL input

   json "{}" | eval t = tan(null)
   | # t: null
   

Compatibility

The tan() function is available since before Sonar 4.0.