Suppose I have something like:
sage: x,y,z=var('x y z')
sage: eq = cos(x)*sin(y)*tan(x)
and I want to substitute a value for x, say, x=5. Then,
I would have
eq = cos(5)*sin(y)*tan(5)
which is what I get when I do .substitute() in sage. However, I want
this partially numerically evaluated to obtain
eq = 0.28366*sin(y)*(-3.38051)
How can I do this?
Thanks in advance.
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