Question

Sin20. Sin40. Sin60. Sin80=3/16

Answer 1

Sin theta.sin(60-theta).sin(60+there)=1/4 sin3 theta.. so sin 60(1/4 sin 120 degrees)=√3/2*(1/4)*(√3/2)=3/16

Answer 2

DEAR STUDENT,


Kindly check the attached papers for a detailed solution along with step by step elaboration to reach our final solution that is our final desired or required answer to this query that is completely proved.


$\boxed{\bf{\underline{L.H.S. = R.H.S.}}}$


Which is the required proof or solution process for this type of query.


Hope this helps you and solves your doubts for applying trigonometric identifies to reach a proper solution or a proof!!!!!