Two circles touch each other internally at O. Chord AB of the larger circle touches the smaller ... VIDEO
Two circles touch each other internally at O. Chord AB of the larger circle touches the smaller circle at \( \mathrm{C} \), then \( \angle \mathrm{AOC} \) is equal to
a. \( \angle \mathrm{CAO} \)
b. \( \angle \mathrm{COD} \)
c. \( \angle \mathrm{OCD} \)
d. \( \angle \mathrm{OCB} \)
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