Question Number 102795 by saorey0202 last updated on 11/Jul/20

Points D, E are taken on the side BC of a △ ABC, such that BD=DE=EC. If ∠BAD=x, ∠DAE=y, ∠EAC=z, then the value of ((sin (x+y) sin(y+z))/(sin x sin z)) is equal to