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Question: Convert logarithmic expression to inverse hyperbolic trig function and back again

Question:Convert logarithmic expression to inverse hyperbolic trig function and back again

joe93407 32 Maple
convert
March 06 2010
0
In Maple 13, I use: convert(arccosh(x),ln); Maple gives: ln(x+sqrt(x-1)*sqrt(x+1)); which is fine. Now try and convert back: convert(ln(x+sqrt(x-1)*sqrt(x+1)),arctrigh); Maple gives: ln(x+sqrt(x-1)*sqrt(x+1)); Why doesn't Maple return arccosh(x)? Thanks.
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