T R I 



II. SPHERICAL TaiaoNOMSTXY. 

 Solution of the six czses of right angled spherical triangfag. 



Given. Soug. 



axes where the lg^ 

 terms required 

 are le^s than} 

 COo. 



If c and b nrr> of ^ 

 same affection .A. 



If b ;utd A sire of 

 same affection 



B Cos. B ~ cos. b X sin. A If b be less !)(R 

 ft ''fan. a - sin. b X tan. A If A be less Oflo. 



c, A 



A,B 



|Taii. b - tan. c X cos. A If c and A I>H of 



I same affectio 

 Sin. a sin. c X sin. A If A be acute 



P Ci ^iJ^ jlfcand A be of 



co^s.'c same affection 



Cos. c cos. X cos. b If tf and b are of 



Tan. A 



tan. a 



same, aff'ection 

 If a be loss than 

 90". 



Cos. c cot. A X cot. B If A and B are 

 cos. A .of same affection 



*' a ~ sin~B" If A be acute 



( 



If the A, instead of being right angled, is a quadrantal A, the suresfc, 

 and perhaps the most expeditious method is to take the supplemental or 

 polar A, and solve it by the above table, taking the supplement? of tha 

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