hitunglah sin 45.sin 75 ------------------- sin 30 .cos 15

Mapel : Matematika
Kelas : X SMA
Bab : Trigonometri

Pembahasan :
Sin 75°
= Sin (90 - 15)°
= Cos 15°

(Sin 45 . Sin 75)/(Sin 30 . Cos 15)
= (Sin 45 . Cos 15)/(Sin 30 . Cos 15)
= (Sin 45°)/(Sin 30°)
= (1/2 √2)/(1/2)
= √2

Trigonometri.
Kelompok wajib kelas X kurikulum 2013 revisi 2016.

sin 45° sin 75° / (sin 30° cos 15°)
= sin 45° sin 75°/ [sin 30° sin (90° - 15°)]
= (1/2 √2) / 1/2
= √2