Built-In Functions and Syntax › Arc Tangent

Arc Tangent

The arc tangent functions return the arc tangent of a numeric value that represents an angle in either degrees or radians.

The single operand that is returned expresses an angle accurate to 10 decimal places in the range +90 to -90 for degrees and -p/2 to +p/2 for radians.

Syntax:

►►─┬─ ATAND ──────────┬─ (value) ─────────────────────────────────────────────►◄
   ├─ ARCTANDEG ──────┤
   └─ ARCTAN-DEGREES ─┘

►►─┬─ ATANR ──────────┬─ (value) ─────────────────────────────────────────────►◄
   ├─ ARCTANRAD ──────┤
   └─ ARCTAN-RADIANS ─┘

Invocation names:

ATAND            ATANR
ARCTANDEG        ARCTANRAD
ARCTAN-DEGREES   ARCTAN-RADIANS

Parameters:

(value)

Specifies the numeric value representing the angle, in degrees or radians, whose arc tangent is calculated.

Example:

This example calculates the arc tangent (in degrees) of 1.7321:

compute 'Arc Tangent' = atand(1.7321)

  ARC TANGENT = 6.0007