If `

Question

If `alpha`, H, A
and `delta` be the altitude, hour angle, azimuth and declination of a
circumpolar star at its elongation, in latitude`lambda` the following
relation holds good

Options:

A . `cos H = tan lambda/ tan delta`

B . `sin alpha = sin lambda/ sin delta`

C . `sin A = cos delta/cos lambda`

D . all the above.

Answer: Option D

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