Question: From area (OBP) area (sector OBP) area (OBP) + area (ABPQ) in Figure, show that Cos t t/ sin t 2

From area (OBP) ‰¤ area (sector OBP) ‰¤ area (OBP) + area (ABPQ) in Figure, show that
Cos t ‰¤ t/ sin t ‰¤ 2 - cos t
And thus obtain another proof that
From area (OBP) ‰¤ area (sector OBP) ‰¤ area (OBP)
From area (OBP) ‰¤ area (sector OBP) ‰¤ area (OBP)

lim (sin ) 1. P(cos t, sin)

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