Proof: lim (sin x)/x
This is a Salman Khan 10 minute video from u-tube. Sal has done thousands of them, mostly math and science, and some social science, subjects.
I discovered him when I went back to relearn the Calculus.
Go to the Khan Academy and watch a few of them. If not the Calculus or Linear Algebra perhaps Credit Default Swaps 1 and 2, or Ponzi Schemes. You won’t be disappointed.
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