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Find the angle subtended at the centre of a circle of radius 3 cm by an arc of length 1 cm

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Solution:  The number of radians in the angle \ = arc/radius=1/3

Hence the angle =1/3 radian =1/3 imes 2/pi right angle = 2/3pi imes 90^circ=60^circ/pi

 

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Deependra Verma

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