It also equals x with appropriate assumptions (x > 0). | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		MForster 1 hour ago \| parent \| context \| favorite \| on: Why Mathematica does not simplify sinh(arccosh(x)) It also equals x with appropriate assumptions (x > 0).

		help

notarget137 27 minutes ago | [–]

Well, then sin(x) = x if x is infinitely small

exe34 59 minutes ago | [–]

so there's an unconditionally correct answer (it's also equal to abs(x) for x>0), and then there is an answer that is only correct for half the domain, which requires an additional assumption.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact