Updates:
Status: Started
Owner: smichr
Comment #3 on issue 1368 by Vinzent.Steinberg: solve((a**2 + 1) * (sin(a*x)
+ cos(a*x)), x) fails
http://code.google.com/p/sympy/issues/detail?id=1368
It is zero:
In [16]: e.rewrite(exp).simplify().expand().cancel()
Out[16]: 0
But the solution can be expressed much simpler.
We really need to improve rewrite to handle sinh, cosh. And .rewrite(tan)
needs to be improved:
In [18]: (sin(x)/cos(x)).rewrite(tan)
Out[18]:
⎛x⎞
2⋅tan⎜─⎟
⎝2⎠
───────────
2
⎛x⎞
1 - tan ⎜─⎟
⎝2⎠
(.rewrite() has a lot of potential, I have a much simpler and more powerful
trigsimp() using .rewrite(exp) in the works. Currently it has to use lot's
of hardcoded pattern matching due to limitations in rewrite() however.)
--
You received this message because you are subscribed to the Google Groups
"sympy-issues" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sympy-issues?hl=en.
