Question

mtk kelas 10 kaa pliss bantuin :((​

Answer 1

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