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Question
If ‘δ’ is the declination of the star and ‘φ’ is the latitude of the observer then the hour angle of the star at elongation is given by
Options:
A .  sin H = tan φ . cot δ
B .  cos H = tan φ . cot δ
C .  tan H = tan φ . cot δ
D .  None of these
Answer: Option B
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