What is the angular velocity of the sun?
Relative to what?
If you mean the angular velocity of the sun about its own axis, it's 2π/t, where t is the time for it to revolve on its axis, which you can look up in wikipedia.
Except of course there's the problem that it revolves quicker near the equator than near the poles, and I expect the inside (which we can't see) revolves at a different rate also.
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