Mathematics
Senior High
Resolved
この解き方の何が違うのですか
△ABCにおいて,次のものを求めよ。
(1) b=3√3,c=5, A=30°のときa
(1) A
2 =
(3)2 +52-2×31×5
27 +25-6.5×5×30
-27+25-30.3×
=
15
52-15√3
√3
22
× 30
Date
3√3
b
530°
A
C
to
B
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