✨ Best Answer ✨
π＜θ＜２πというのは第３象限と第４象限なのでsinだと
sinθ＜０になりますね
第1象限 第２象限 第３象限 第４象限
sin ＋ ＋ − −
cos ＋ − − ＋
tan ＋ − ＋ ＋
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