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CHAPTER 4. TRIGONOMETRY
=
=
Figure 67.
=
468. fåîÉêëÉ=q~åÖÉåí=cìåÅíáçå==
π π
≤
ó = ~êÅí~å ñ I= ∞ ñ ≤ ∞ I= − < ~êÅí~å ñ < K=
−
O O
=
===== =
=
Figure 68.
100
