Tolong dijawab Pake Cara ya….​

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Tolong dijawab Pake Cara ya....​

Tolong dijawab Pake Cara ya….​

Penjelasan dengan langkah-langkah:

<CPB = 1/2 (<COB – <DOA)

15° = 1/2 (<COB – 20°)

2 × 15° = <COB – 20°

30° = <COB – 20°

<COB = 30° + 20°

<COB = 50°