Mathematics
Senior High
数学IIの三角関数の加法定理の範囲の問題です。
171の(1)と(2)の問題の解き方が全く分かりません。
説明と回答お願い致します🙇♀️
171 次の式を簡単にせよ。
sin(o-号)
(2) cos0
2
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