sin18-0-

Question Number 21815 by gopikrishnan005@gmail.com last updated on 04/Oct/17

s i n 18^{0} =

Commented by Tinkutara last updated on 04/Oct/17

\frac{\sqrt{5} - 1}{4}

Commented by math solver last updated on 05/Oct/17

e m m m .

u s e i d e n t i t y \sin 3 A = 3 \sin A - 4 \sin^{3} A