Prosthaphaeresis
...that the astronomer Tycho Brahe calculated products quickly using Prosthaphaeresis, a 17th century algorithm exploiting trigonometric identities?
...that the astronomer <a href="./Tycho_Brahe" id="mwBCw" rel="mw:WikiLink" title="Tycho Brahe">Tycho Brahe</a> calculated products quickly using <b id="mwBC0"><a href="./Prosthaphaeresis" id="mwBC4" rel="mw:WikiLink" title="Prosthaphaeresis">Prosthaphaeresis</a></b>, a <a href="./17th_century" id="mwBC8" rel="mw:WikiLink" title="17th century">17th century</a> algorithm exploiting trigonometric identities?