Mathematics
Senior High
私のかいとうここまで合ってますか??
(4)
Cose= 2B+4+2 -6
2.(11月).2
2.8
213
4(1か回)
4+48
2+29
4) 余弦定理により
cosC=°+6-c2
2ab
2.(1+V3)-2
2
よって
C=60°
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