Mathematica 9 is now available
Student Support Forum
-----
Student Support Forum: 'Simplification concerning trigonometric functions' topicStudent Support Forum > General > "Simplification concerning trigonometric functions"

Next Comment >Help | Reply To Topic
Author Comment/Response
Tang
10/13/06 04:55am

Hello,

I'm puzzled by a problem about simplification of trigonometric functions.

I want to merge the terms with the same trig functions without changing other parts.

I tried 'Simplify' or 'TrigReduce', but 'TrigReduce' fails to merge the terms and 'Simplify' would do but it also simplifies the coefficients and the variables in trig functions.

For example, I want expr (1) to be rewritten as expr (2), how could I possibly write the code?

(1): a*Sin[x]+a^2*Sin[x]+c*Sin[2x+2y]+d*Sin[2x+2y]
(2): (a+a^2)Sin[x]+(c+d)*Sin[2x+2y]

If I use 'Simplify', the result would be

a(1+a)Sin[x]+(c+d)*Sin[2(x+y)]

both the coefficients of Sin[x] and variable of 2x+2y are simplified, which fails my request.

It's no more than a minor problem in simplification and won't affect much, but I really wish it be solved.

Thank you very much

URL: ,

Subject (listing for 'Simplification concerning trigonometric functions')
Author Date Posted
Simplification concerning trigonometric functions Tang 10/13/06 04:55am
Re: Simplification concerning trigonometric fun... Peter Pein 10/20/06 9:58pm
Re: Simplification concerning trigonometric fun... Tang 10/25/06 02:03am
Next Comment >Help | Reply To Topic