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In the given figure, is shown a sector O...

In the given figure, is shown a sector OAP of a circle with centre 0, containing ` /_ theta`. AB is perpendicular to the radius OA and meets OP produced at B. Prove that the perimeter of shaded region is `r[tan theta + sec theta + pi theta/180 - 1]`

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Figure shows a sector of a circle,centre O, 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 shaded region is (r^(2))/(2)(tan theta-pi(theta)/(180))

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