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 Microsoft Excel > Functions > Maths and Trigonometry > ACOSH
 

ACOSH(number)

 
 Returns the inverse hyperbolic cosine of a number.

 numberThe number you want the inverse hyperbolic cosine of.

 REMARKS
 
  		• The inverse hyperbolic cosine of an angle is the inverse of the COSH() function.
     
  		• The "number" is the angle in radians.
     
  		• If "number" < 1, then #NUM! is returned.
     
  		• If "number" is not numeric, then #VALUE! is returned.

     EXAMPLES
     
     A
    1=ACOSH(1) = 0
    2=ACOSH(COSH(1)) = 1
    3=ACOSH(COSH(10)) = 10
    4=ACOSH(45) = 4.5
    5=ACOSH(ACOS(0.5)) = 0.306
    6=ACOSH(COSH(355)) = 355
    7=ACOSH(COSH(356)) = #NUM!
    8=ACOSH(COSH(500)) = #NUM!
    9=ACOSH(-1) = #NUM!
    10=ACOSH("some text") = #VALUE!
    		 
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