Mathematics
Senior High
この写真の問題3問の式と答え教えて欲しいです！
課題の問題で今日提出なのでお願いします！
3
<a</C, cosa = -3
で,
4
0<a<π C, cosa =
18
のとき, cos2a の値
-
のとき, sin の値を
(税
z< a < -27 C, sina = 5
a
のとき, COS
の
COS･
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