trig expansion
- To: mathgroup at smc.vnet.net
- Subject: [mg8854] trig expansion
- From: murray at math.umass.edu (Murray Eisenberg)
- Date: Tue, 30 Sep 1997 20:16:15 -0400
- Organization: University of Massachusetts, Amherst
- Sender: owner-wri-mathgroup at wolfram.com
How can I cause Mathematica to expand Sin[2 Pi omega t + 2 Pi delta],
where delta and omega are symbols, into the form
Cos[2 Pi delta] Sin[2 Pi omega t] + Sin[2 Pi delta] Cos[2 Pi omega t]
without using a replacment rule
Sin[a_ + b_] -> Sin[a]Cos[b] + Cos[a]Sin[b]
explicitly? (No TrigExpand does NOT do the trick -- it expands all
the way down to trig functions of Pi delta and Pi t omega!)
--
Murray Eisenberg Internet: murray at math.umass.edu
Mathematics & Statistics Dept. Voice: 413-545-2859 (W)
University of Massachusetts 413-549-1020 (H)
Amherst, MA 01003 Fax: 413-545-1801