, . cosfli tan flg-sinfli cos A A 

 '=°'"" sinAA. 



. o cosflztangi-sinflzcos A A 

 '^°^*^' sinAA 



cos(cli+ d2)=sin9i sinez+coseicosgzcos A A 

 sin(cli+d2)=(cos0isinAA)/sin B=(cose2SinAA)/sinA 

 singi = sinSocos di , sin62= sinSocos dz 

 NOTE^Qo may be external to QiQz.i.o. if either 

 A or B IS greater ttian 90° 



Figure 16. Elements of polar spkerical triangles. 

 58 



