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# Cos

## Using the Cos Function

In this tutorial you will learn how to use the Cos Function.

The Cos function returns a Double specifying the cosine of an angle.

=Cos( number )

number any valid number expression that expresses an angle in radians

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

The result lies in the range -1 to 1.

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

In this example we will use 1.

The result is 0.54030230586814.

Query

The results using a Query would be

```	SELECT Cos(1);
```

FORM

In a Form you could set the Default Value of a Textbox to

```	=Cos(1)
```
VBA

In a Form add a TEXTBOX control and rename it "txtCos", then you could add the following in the Load Event.

```	Private Sub Form_Load()
txtCos = Cos(1)
End Sub
```

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