SINUS (A – B) TRIGONOMETRI -MATEMATIKA SMA KELAS 11
Oleh : Suryadi
Director of Education Apenso Indonesia
SOAL :
Hitunglah sin 15° !
JAWAB :
Sin 15° = sin (60° – 45°)
= sin 60° . cos 45° – cos 60° . sin 45°
= (1/2 . √3) (1/2 . √2) – (1/2) (1/2 . √2)
= 1/4 √6 – 1/4 √2
🌸Selamat Belajar & Good Luck!🌸