My Math Forum Relationship between log and arcs

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 November 12th, 2013, 05:38 AM #1 Senior Member   Joined: Nov 2013 Posts: 137 Thanks: 1 Relationship between log and arcs If there is a formula relating the exponential with sine and cosine normal and hyperbolic (exp (ix) = cos (x) + i sin (x), exp (x) = cosh (x) + sinh (x)), there is also a formula relating the logarithm with arcsin, arccos, and arcsinh arccosh?
 November 12th, 2013, 08:09 AM #2 Senior Member   Joined: Feb 2013 Posts: 281 Thanks: 0 Re: Relationship between log and arcs Correct. See Logarithmic forms
 November 12th, 2013, 04:18 PM #3 Senior Member   Joined: Nov 2013 Posts: 137 Thanks: 1 Re: Relationship between log and arcs YEAH!!! I wrote this topic thinking these formulas! But, what is the general expression that connects both the sine and the cosine with the logarithm!?

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