Astrophysics 2.03 - Spherical Sine Law

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This video explains the derivation of Spherical Sine Law as applied to spherical triangles.
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Nice. This video is actually useful. Thank you. You rushed at about 1:10 identifying angles A, B that took a bit of thinking about and checking (maybe that's just me). There is no sequel for the cosine rules that I can find. :(

colfrancis
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