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 Microsoft Excel > Functions > Maths and Trigonometry > COS
 

COS(number)

 
 Returns the cosine of an angle in radians.

 numberThe number you want the cosine of.

 REMARKS
 
  		• The "number" is the angle in radians.
     
  		• If "number" is not numeric, the #VALUE! is returned.
     
  		• If your argument is in degrees, multiply it by PI()/180 to convert it to radians.
     
  		• You can use the DEGREES() function to convert from radians to degrees.
     
  		• The inverse of this function is the ACOS() function.

     EXAMPLES
     
     A
    1=COS(20) = 0.408
    2=COS(60*PI()/180) = 0.5
    3=COS(-50) = 0.965
    4=COS(ACOS(0.5)) = 0.5
    5=COS("some text") = #VALUE!
    		 
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