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Precalculo/ precalculus...sen 80 31. a) cos V I — cos 300 32. a) b) 2 sen 30 COs 30 2 tan 70 1 b) cos2 — sen2 58 b) 2 sen cos — 1 — cos 40 sen 48 I — cos 80 59—76 Dernuestre

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