An diofar eadar na mùthaidhean a rinneadh air "Cruinneadaireachd"

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b robot Adding: nl:Sferische geometrie
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Loidhne 88:
::<math> \tan \tfrac {1}{2}(A-B) = \frac{ \sin \tfrac {1}{2}(a-b) } {\sin \tfrac {1}{2}(a+b)} \cot \tfrac {1}{2}C </math>
 
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[[de:Sphärische Geometrie]]