Learn about new technologies!

What is the correct answer?


If α, H, A and δ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude λ, the following relation holds good

A. cos H = tan λ/tan δ

B. sin α = sin λ/sin δ

C. sin A = cos δ/cos λ

D. All the above