mtk kelas 10 kaa pliss bantuin :((
Penjelasan dengan langkah-langkah:
A + B + C = 180°
A + B + 90° = 180°
A + B = 90°
sin(A + B) = sin A cos B + cos A sin B
sin (90) = sin A cos B + cos A sin B
sin A cos B + cos A sin B = 1
8 tan A = 3 sin B
8 sin A / cos A = 3 sin B
8 sin A = 3 cos A sin B
8 sin A = 3 (1/2)(sin (A + B) - sin (A - B))
8 sin A = 3/2 (1 - sin (A - B))
8 sin A = 3/2 (1 - (sin A cos B - cos A sin B))
8 sin A = 3/2 (1 - sin A cos B + cos A sin B)
8 sin A = 3/2 (1 - 1)
8 sin A = 3/2(0)
8 sin A = 0
sin A = 0/8
sin A = 0
