Surya Siddhanta
क्रान्तिज्याप्ते तु तौ कर्णौ सममण्डलगे रवौ । सौम्याक्षोना यदा कान्तिः स्यात् तदा द्युदलश्रवः॥
When the (Sun's) north declination is less than the latitude, the hypothenuse of the shadow at noon multiplied by the equinoctial shadow and divided by the reduced sine of amplitude at noon, gives the (same) hypothenuse[2] (which is found in the preceding Śloka). [2. This is proved thus. Let h = the hypothenuse of the shadow at noon; a = the sine of amplitude reduced to that hyp. ∴ a R h {\displaystyle \therefore {\frac {aR}{h}}} = the sine of amplitude in terms of the radius.]
english translation
krAntijyApte tu tau karNau samamaNDalage ravau । saumyAkSonA yadA kAntiH syAt tadA dyudalazravaH॥
hk transliteration by Sanscript