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[" 26.Figure "15.20" ,shows a sector of ...

[" 26.Figure "15.20" ,shows a sector of a circle,centre "0" ,containing an angle "theta^(@)" .Prove that: "],[" (i) Perimeter of the shaded region is "r(tan theta+sec theta+(pi theta)/(180)-1)],[" (ii) Area of the shaded region is "(r^(2))/(2)(tan theta-(pi theta)/(180))]

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