Calculus 1 Lecture Notes. Section 2.6

Before we can prove these derivatives, we need to establish some helpful limits, because we stumble upon them in applying the definition of the derivative to the sine function: We have to prove that and that to complete the proof… Prove: (Lemma 6.1) Notice from the figure that 0 ≤ sin θ ≤ θ. (by the Squeeze Theorem) Prove: (Lemma 6.2 ... ................
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