Re: TrigExpand - Odd behavior
- To: mathgroup at smc.vnet.net
- Subject: [mg55440] Re: TrigExpand - Odd behavior
- From: "David Park" <djmp at earthlink.net>
- Date: Wed, 23 Mar 2005 05:34:51 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Bob, That does seem like a bug - or at least a feature. But the following works... Cos[x + 45 Degree] // N // TrigExpand // Chop 0.707107 Cos[x] - 0.707107 Sin[x] Cos[x + Pi/4] // TrigExpand Cos[x]/Sqrt[2] - Sin[x]/Sqrt[2] David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Bob Stagat [mailto:stagat at linkline.com] To: mathgroup at smc.vnet.net Try executing the following three lines and explain the last result... Cos[45 Degree] Cos[x+45 Degree] Cos[x+45 Degree]//TrigExpand Thanks... ~ BS ~