This is a rather simple numerical solution, but it simply doesn't work. Does anybody have a solution?
NSolve[x - Sinh[x] - 1 == 0, x]
NSolve::nsmet: This system cannot be solved with the methods available to NSolve.
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1 Answer
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NSolve[x - Sinh[x] - 1 == 0, x, Reals]
(*
{{x -> -1.72912}}
*)
answered Nov 19, 2013 at 7:06
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$\begingroup$ That is strange, since the first thing I tried is this:
Assuming[Element[x, Reals], NSolve[x - Sinh[x] - 1 == 0, x]]and it did not work ! I see from help now that NSolve takes Reals as second argument. But this is not very consistent with how other functions work, by using Assuming. $\endgroup$– NasserNov 19, 2013 at 7:12 -
1$\begingroup$ @Nasser I don't think the assumption is taking effect on the NSolve "Block[]" $\endgroup$ Nov 19, 2013 at 7:14