Mathematics
Senior High
(2)のcos(α-β)が分かりせん。
答えと途中式も教えて下さい🙇♀️
@ 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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