9. If n = 22/7, then a unit radian is approximately equal to
(a) 57° 16' 22"
(b) 57° 15' 22"
(c) 57° 16' 20"
(d) 57° 15' 20" (CDS 2007)
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Answer:
22/7=pie the it must be equal to
option c
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