Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · Cambridge, University press · leaf 47
oining their noles. The inclination of two ungraduated great circles is in general unavoidably ambiguous, for it may be either of two supplemental angles, and it is only when the two circles cross at right angles that this ambiguity disappears. But the inclination of two graduated great circles… … Fig. 13. between those parts of the circles in which the arrow-heads are both diverging from an intersection or cJonverging towards an intersection. In Fig. 13 the two segments of the circles diverging from 0 are OA^ and OA^, and consequently the angle is to be AfiA^ = e. If however we simply…
Spherical astronomy
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