# Tan Function

Returns a Double specifying the tangent of an angle.

Syntax

Tan( number )

The required numberargument is a Double or any valid numeric expression that expresses an angle in radians.

Remarks

Tan takes an angle and returns the ratio of two sides of a right triangle. The ratio is the length of the side opposite the angle divided by the length of the side adjacent to the angle.

To convert degrees to radians, multiply degrees by pi/180. To convert radians to degrees, multiply radians by 180/pi.

## Query example

Expression

Results

SELECT Tan(90) AS Tangent FROM ProductSales GROUP BY Tan(90);

Returns the "Tangent" of the number argument (any numeric expression that expresses an angle in radians) and displays in the column Tangent

## VBA example

Note: Examples that follow demonstrate the use of this function in a Visual Basic for Applications (VBA) module. For more information about working with VBA, select Developer Reference in the drop-down list next to Search and enter one or more terms in the search box.

This example uses the Tan function to return the tangent of an angle.

``` Dim MyAngle, MyCotangentMyAngle = 1.3 ' Define angle in radians.MyCotangent = 1 / Tan(MyAngle) ' Calculate cotangent. ```