Then determine (A) uniquely: If (\sin A > 0), (A) in (0°–180°); if (\sin A < 0), (A) in (180°–360°). Or use atan2.
Ambiguity Check: Since $\sin(A) = \sin(180-A)$, we must determine if the star is East or West. Since $H = 60^\circ$ (West of the meridian), the Azimuth is measured West from North. Altitude $\approx 40.8^\circ$, Azimuth $\approx 81.9^\circ$ (West). spherical astronomy problems and solutions
The astronomical triangle connects:
z is approximately equal to arc cosine 0.729 is approximately equal to 43.2 raised to the composed with power 3. Determine Altitude Then determine (A) uniquely: If (\sin A >