sin77Sin Sin 77 Live at The Casbah 04242004. Sin Sin 77 • Album. 10 videosLast updated on Feb 13, 2025.Note that sin77° is periodic: sin (77° + n × 360°) = sin 77 degrees, n$hspace{5px} in hspace{5px} mathbb{Z}$. There are more formulas for the double angle (2 × 77°), half