$sin75=sin(45+30)=sin45.cos30+sin30.cos45=\frac{\sqrt2}{2}.\frac{\sqrt 3}{2}+\frac{1}{2}.\frac{\sqrt 2}{2}=\frac{\sqrt 6+\sqrt 2}{4}$ olur.
Buna göre $sin45.sin60.sin75=\frac{\sqrt 2}{2}.\frac{\sqrt3}{2}.\frac{\sqrt 6+\sqrt 2}{4}=\frac{6+2\sqrt3}{16}=\frac{3+\sqrt3}{8}$ olur.