CHAPTER 4. TRIGONOMETRY
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ó=ÅçíñI=ñ≠âπI==−∞≤Åçíñ≤∞K=
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Figure 62.
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ó=ëÉÅñI= ()
Oñ Oâ Nπ
≠ + K===
dana p.
(Dana P.)
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