User talk:WTMitchell3
Thanks and sorry for returning to you after some much time (I don't read messages sent to me frequently). I used the spherical law of cosines while assuming measuring the latitude from the pole, as in spherical coordinates. This is done in the Wikipedia article about the spherical law of cosines. However, in geography one starts measuring the latitude from the equator, and this resulting in obtaining the formula you thought about. Anyway, my editing was reversed several hours after its creation.
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