Question

How to find the value of sin 10?

Answer 1

$\sin 3x=3\sin x-4{\sin }^{3}x$
$\sin 30=3\sin 10-4{\sin }^{3}10$
$6\sin 10-8{\sin }^{3}10=1$
Solving the above cubic equation we get sin 10 as 0.176