stefan.o...@gmail.com ha scritto:
Hello,
I have a term t that I simplify with t.simplify_trig(). Parts of the
result look something like this:
65*sin(0.500000000000000*pi)*sin(x2)*cos(x3)*sin(x5)+...
My limited math understanding tells me that sin(0.5*pi) is zero,
sin(pi/2)=0, that's rignt
But 0.500000000000 probably means 0.5+10^(-15) or something like that.
You should say from what computation comes that 0.5000.
By the way,
sage : numerical_approx(1/2)-1/2
0.000000000000000
I guess Sage does not consider the result of numerical_approx() as an
exact value :
print type(numerical_approx(1/2))
print type(1/2)
<type 'sage.rings.real_mpfr.RealNumber'>
<type 'sage.rings.rational.Rational'
My two cents
Laurent
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