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MathGroup Archive 2007

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Re: Inverse Tangent function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80025] Re: Inverse Tangent function
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Fri, 10 Aug 2007 06:47:25 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <f9gtl1$a6d$1@smc.vnet.net>

Boen S. Liong wrote:
> Let w1 = tan-1(x)  i.e. inverse tangent of x or tan(w1) = x
<snip>
In Mathematica, the tangent function is written *Tan* and the inverse 
tangent function is *ArcTan*, so you would write

w1 = ArcTan[x] or x = Tan[w1]

(Note the /square/ brackets that enclose the argument list.)

Also, you could have a look at some simplification function such as 
Simplify or TrigExpand as well as Solve and Reduce.

-- 
Jean-Marc


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