this is a geometric proof from James Stewart's calculus textbook page 192. I'm confused in the sequence of inequalities as part of the proof...(adsbygoogle = window.adsbygoogle || []).push({});

theta = arcAB < AB + EB ==> arcAB < AE + ED. How did EB turned into ED?

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# I Proving the limit of sinx/x as x approaches 0 equals 1

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