ABCD is a rectangle such that
∣AB∣>∣BC∣ and O is the mid−point
of DC, if ∣OB∣=0.1m and ∠BOC =𝛉,
find an expression for the perimeter of
the rectangle in terms of 𝛉. Find also,
the values of R and 𝛃 for which the
perimeter is Rcos(𝛉−𝛃). Deduce, the
greatest possible value oc the perimeter.
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