(5π/6-x)+(x+π/6)=π(5π/6-x)=π-(x+π/6)sin(5π/6-x)=sin[π-(x+π/6)]=sin(x+π/6)=1/4(11π/6-x)+(x+π/6)=2π(11π/6-x)=2π-(x+π/6)sin(11π/6-x)=sin[2π-(x+π/6)]= - sin(x+π/6)= - 1/4sin^2(11π/6-x...