सिद्धान्तशिरोमणि: गोलाध्याय (भास्कराचार्य - मरीचि भाष्य एवं पं. केदारदत्त जोशी सविस्तार व्याख्या)

, does it say १५ or something else? Look at the number: ध - नु - रं - शाः । Then a number: is it १५? Wait, arc of sine 2431: Sine of 30° is 1719 (for R=3438, sin 30° = 1719, sin 45° = 2431). Arc of 2431 is 45°! Wait! Is that ४५ or १५? Look at line 27: "धनुरंशाः ४५ पलांशाः ।" Wait, look at the first digit of the number: Is it ४ or १? Wait, in line 24: "दिगंशाः ४५" -> notice the shape of ४ in ४५! Now look at line 27: the digit looks like ४ or १५? Wait, let's look closely: In line 27, it has: a loop like '४' or '१'? Wait, the arc of 2431 is 45 degrees! Since sin(45°) = 2431! In line 24: "दिगंशाः ४५ एषां [ज्य] २४३१". Then "अक्षज्यैव २४३१ । अस्या धनुरंशाः ४५ पलांशाः ।" So the dhanuramsha MUST be 45!