Compute angular length c of the great-circle route between these two cities:
Daytona Beach (location A): $29^\circ12'\ N, 81^\circ1' \ W$.
Sidi Ifni (location B): $29^\circ23' \ N. 10^\circ10' \ W$.
Ok so I converted the latitudes and longitudes and I now have:
Daytona Beach (location A): $29.20^\circ N, 81.02^\circ W$
Sidi Ifni (location B): $29.38^\circ N, 10.16^\circ W$
$\cos N = .18º$
After using the law of cosines:
$\cos c = \cos(81.02^\circ)\cos(10.16^\circ) + \sin(81.02^\circ)\sin(10.16^\circ)\cos(.18^\circ) = 0.3279$ $\arccos(0.3279) = 70.86^\circ = c$
Am I on the right track?