sin 1/2Π×sin1/4Π×sin1/6Π

1/2 x 180=90*x 1/4x180=45* x 1/6x180=30*
sin90 x sin 45 x sin 30
1x1/2√2x1/2=1/4√2

Trigonometri.
Matematika wajib kelas X kurikulum 2013 revisi 2016.

sin π/2 sin π/4 sin π/6
= 1 (1/2 √2) (1/2)
= √2 / 4