If ≈í¬± is the observed altitude, the refraction correction in se – McqOptions

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1.	If ≈í¬± is the observed altitude, the refraction correction in seconds, is$
A.	58" cot ≈í¬±
B.	58" tan ≈í¬±
C.	58 sin ≈í¬±
D.	58 cos ≈í¬±
Answer» B. 58" tan ≈í¬±

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