Mathematics
Senior High

(2)のcos(‪α‬-β)が分かりせん。
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@ が鋭角、 8 が鈍角であるとき, 次の値を求めよ。 Doi 3 3 sime=ニーテデー Cos@ニーー のょき 0 SCよの 明上tano三], tanのニー2 のとき tan(gw十の, cos(c一め

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