Mathematics
Senior High
この問題ってどうやって解くんですか😓教えてください🙏🏻🙇🏻♀️お願いします！
38 次の式の値を求めよ。
(1) sin 70°+ cos 100° + sin 170° + cos 160°
(2)
sin 140°cos50° + cos40° sin 50°
COS 20°
解答 (1) 0 (2) 1
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