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https://twitter.com/TIinExile/status/1203928100955779072Though trivial facts at first sight- consider this
https://twitter.com/TIinExile/status/1203928100955779072
https://twitter.com/JoeAgneya/status/1198099977215471616Nīlakaṇṭha Somayājī- Jyeṣṭhadeva's Contemporary provides the Exact Form of the Derivative of the Inverse Sine Function in his Tantrasaṅgrāha