i get a different result
pprint(Integral((sin(m*pi*x/a)*sin(pi*x/a)), (x,0,a)).doit() )
2 2 2
a⋅π ⋅sin(π⋅m) a⋅π ⋅m ⋅sin(π⋅m)
- ──────────────────── + ────────────────────
3 2 3 3 4 3 2 3 3 4
2⋅π ⋅m - π - π ⋅m 2⋅π ⋅m - π - π ⋅m
but my error is that i forgot to express that i am assuming m is an
integer. although i have not set this flag because the integral
evaluates incorrectly ( you actually helped me with this about year
ago)
so maybe the intuitive answer i am looking for is a correct evaluation
of the integral when m.is_integer is true.
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