Question

TOLONG BANTU JAWAB KAK
BESOK SUDAH HARUS DIKUMPULKAN NIH​

Answer 1

Verified answer

Jawab:

segitiga

Aturan cosinus

Aturan sinus

Penjelasan dengan langkah-langkah:

i) aturan cosinus

BC^2 = AB^2 + AC^2 - 2. AB. BC. cos A

BC^2 = 16 + 4 - 2. 4. 2. cos 60

BC^2 = 16 + 4 - 16 (1/2)

BC^2 = 20 - 8 = 12

BC= √12 = 2√3

ii) Aturan sinus

AC/sin B = BC/sin A

2/sin B = (2√3) /sin 60

2/sin B = (2√3)/(1/2√3)

2/sin B = 4

sin B = 2/4 =1/2 = sin 30

<B = 30°