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Re: calculating points

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122545] Re: calculating points
  • From: "Chris Degnen" <degnen at cwgsy.net>
  • Date: Mon, 31 Oct 2011 06:53:18 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <j8j5pv$fas$1@smc.vnet.net>

steven darcy wrote:
>
> I have a function f[x]=[129.3 - 25.3 Cos[x] - Sqrt[10816 -
> (25.3*Sin[x])^2] how can i find the y value for a given x value?
>

A quick demo:

f[x_] := 129.3 - 25.3 Cos[x] - Sqrt[10816 - (25.3*Sin[x])^2];
Print[Row@{"When x = 8, y = ", y = f[8]}]
Show[Plot[{f[a], y}, {a, 0, 10}], Graphics@Line[{{8, 0}, {8, y}}]]




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