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Question


If`delta`is the
declination of the star and `phi` is the latitude of the observer then the
hour angle of the star at elongation is given by



Options:
A .  `sin H = tan phi . cot delta`
B .  `cos H = tan phi . cot delta`
C .  `tan H = tan phi . cot delta`
D .  none of these
Answer: Option B



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