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प्रश्न
In the parallax formula D = b/θ, what must be true about the angle θ for the calculation to be correct?
विकल्प
Arcseconds
Arcminutes
Radians
Degrees
MCQ
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उत्तर
Radians
Reason:
This formula is a small-angle approximation derived from trigonometry, which is only valid when the angle θ is expressed in radians.
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