Mathematics
Senior High
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解説がなく(1)の解き方がわかりません。教えてください🙏
答えは104°です。

(1) (2) 問2 下の図で, BTは円0の接線, Bはその接点である。 角0 を求めよ。 A (3) a 115° C 35° A E 100 C O B 52% T AN 40°C B T B * =OA 8-7

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