I think you can take another approach as well by using the fact that sinh(x)=[exp(x)-exp(-x)]/2 and swapping the x for a lnx but yea your answer seems to simplify to the same one i got which is 0.5 +0.5x^-2
I think you can take another approach as well by using the fact that sinh(x)=[exp(x)-exp(-x)]/2 and swapping the x for a lnx but yea your answer seems to simplify to the same one i got which is 0.5 +0.5x^-2