Question

Trig @ganeshie8 @ikram002p

Answer 1

\[\sin \frac{ \pi }{ 9}\sin \frac{ 2\pi }{ 9}\sin \frac{ 3\pi }{ 9}\sin \frac{ 4\pi }{ 9}= \frac{ 3 }{16 }\]
Prove this

Answer 2

@Nurali @ShadowLegendX

Answer 3

ok , which angle you know its sin ?

Answer 4

Thats the question im not sure what u mean

Answer 5

well , this could be easily shown from calculator :o
but if you wanna use identity , there is special angels would be its sin /cos given / known
to evaluate this

Answer 6

ty

Answer 7

Did you prove it? Do you still need help?

Answer 8

:o ty for what
did u got it ?