Question

まや

6.7.9教えてください🙏🙇‍♀️

(6)
B
(8).
B
9
60
D
10
60°
A
10
LO
5
U
AM=
ADが∠Aの
二等分線のとき,
AD
√30
=
AC = 8
49 = 9+7²-67 cos 60°
49: 2+1x²-10x cos60 2√2
4xcoś 60° = 16
x = f
(9)
(98追試 4/20)
0
D
y
(7)
B
3
120
2-√√3
X
60°
60°
2√2
B
A
OB=
13
BA
- 4 + 12 = 4By cos 30°
y² = 2
x+y=6
(99本試の構図より)