Returns the cosine of the given angle.
Syntax
COS(number)
Number is the angle in radians for which you want the cosine.
Remark
If the angle is in degrees, either multiply the angle by PI()/180 or use the RADIANS function to convert the angle to radians.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
 Create a blank workbook or worksheet.
 Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
 Press CTRL+C.
 In the worksheet, select cell A1, and press CTRL+V.
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A 
B 
Formula 
Description (Result) 
=COS(1.047) 
Cosine of 1.047 radians (0.500171) 
=COS(60*PI()/180) 
Cosine of 60 degrees (0.5) 
=COS(RADIANS(60)) 
Cosine of 60 degrees (0.5) 
