According to maple they are symbolically equal. I did not dig into it to try to see why. On Mon, Aug 20, 2018 at 5:19 PM Dan Asimov <dasimov@earthlink.net> wrote:

Let f(x) = ln(2-2*cos(x))

Then are these two numbers equal?

A = -Integral from 0 to π/3 of f(t) dt

B = Integral from π/3 to π of f(t) dt

I can't tell. But they're extremely close.

—Dan

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