Question

Prove that if l is the length of the chord of circular
arc, l , The chord of two-thirds of arc and 2l chord
of one-third of arc, the length of the arc is
approximately ( 9 45 ) 10 1 2
1 l  l  l and that the
approximation is correct to the order of 6  where
 is the angle which the arc subtends at its
centre.

Answer 1

Answer:

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