While measuring the distance between two points along upgrade with the – McqOptions

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1.	While measuring the distance between two points along upgrade with the help of a 20 m chain, the forward end of the chain is shifted forward through a distance
A.	20 (sin Œ∏ - 1)
B.	20 (cos Œ∏ - 1)
C.	20 (sec Œ∏ - 1)
D.	20 (cosec Œ∏ - 1).
Answer» D. 20 (cosec Œ∏ - 1).

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