Mathematics
Senior High
cos(3/2π－θ)が－sinθになるのはどうしてですか？
(の いい 二 人) 9 9
2 2
三cosの一cosの十sjnの一sinの=0
④ sin15"=sin(60"一459 =ニsin60"cos459 ー Anc QOS 1 4に9
⑨⑳. smテーの 十cos(z填の十Sim(々メーの +cos(テの) (
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