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Cos

COS Function

The COS function in Excel returns the cosine of a given angle. This function expects the angle to be provided in radians. If you have an angle in degrees and need to convert it to radians, you can use the RADIANS function.

Syntax:

COS(number)
  • number: The angle in radians for which you want the cosine.

Examples:

  1. =COS(0) would return 1, since the cosine of 0 radians is 1.
  2. If you have an angle of 60 degrees and want to find its cosine, you can combine the RADIANS and COS functions: =COS(RADIANS(60)) would return 0.5.

Note: Trigonometric functions like COS can be instrumental in engineering, physics, and other fields where calculations involving angles and circular motion are required.