Changes

*This function gives the Inverse Hyperbolic Cosine of a number.  

*This function gives the Inverse Hyperbolic Cosine of a number.  

*Here 'z' is  any positive real number i.e, <math>z \ge 1</math>.  

*Consider 'z' is  any positive real number i.e, <math>z \ge 1</math>.  

*Inverse Hyperbolic sine of a number is defined by <math>Acosh(z)=\log_e(z+\sqrt{z^2-1})</math>

*Inverse Hyperbolic sine of a number is defined by <math>Acosh(z)=\log_e(z+\sqrt{z^2-1})</math>

*Also ACOSH(COSH(z))=z

*Also ACOSH(COSH(z))=z