SINUS (A + B) TRIGONOMETRI – MATEMATIKA SMA KELAS 11
Oleh : Suryadi
Director of Education Apenso Indonesia
SOAL:
Hitunglah sin 75° !
JAWAB:
sin 75° = sin (45° + 30°)
= sin 45° . cos 30° + cos 45° . sin 30°
= (1/2 √2) . (1/2 √3) + (1/2 √2) . (1/2)
= 1/4 √6 + 1/4 √2
🌸Selamat Belajar & Good Luck!🌸