Mathematics
Senior High
Resolved
数1これであってますか？模試の過去問なので答えがなく困っています
(3)(i) 0°0≦180° で tan6=3 のとき, cose の値は,
である.
() 2直線 y=x,
セス
x のなす鋭角は,
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ありがとうございました♪