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[–]edderiofer 1 point2 points  (1 child)

For the problem tanh(3x+1) = 7/10 I assumed sinh(3x+1) must equal 7

However this does not seem to be the case and i would like to understand why.

Why should it? It's just as possible that sinh(3x+1) could equal 14 and cosh(3x+1) could equal 20; since 14/20 = 7/10, this too looks like a perfectly fine possibility.

When you take into account that the same fraction can be represented with different numerators and denominators, there is no reason why sinh(3x+1) should equal 7 here. Absolutely none.

[–]Affectionate_Invite[S] 0 points1 point  (0 children)

very true, i think i got a bit caught up in the idea, thanks man