In figure, shown a sector OAP of a circle with centre O, containing angle θ, AB is perpendicular to

Описание: #2_pi_classes #class10maths
#InfigureshownasectorOAPofacirclewithcentreO
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In figure, shown a sector OAP of a circle with centre O, containing angle θ, AB is perpendicular to the radius OA and meets OP produced at B. Prove that the perimeter of shaded region is r[tanθ+secθ+ πθ/180° - 1].
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