Mathematics
Senior High
全て0≦x<2πのとき
①sinx=-2分の√2 ②cosx<2分の1 ③tanx≧1
④4cos²x=3 ⑤3(1+sinx)≦2cos²x ⑥sin(x+3分のπ)≦2分の1
たくさんありますが、よろしくお願いいたします！
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