एतत् पृष्ठम् अपरिष्कृतम् अस्ति
(The Zenith distance of the Nonagesimal, Zdn) 9. (a) Multiply the R sine of the latitude of the place by the final semi-day-diameter (i.e., R cos 24°) and divide by R. (b) Multiply the R cosine of latitude of the place by the R cosine of the Kojalagna, and divide by 8452. 10. The difference of the two, or sum, is the Zenith distance of the nonagesimal (Zdn), when the Kalalagna is, respectively, in the six signs beginning from Cancer or in the six signs beginning from Capricorn. In the case of the difference, if the part using R cosine of place (/.*., b) is greater, the Zdn is north. Otherwise, and in the case of the sum, it is south, always.
