Mathematics
Senior High
この問題が何回やっても√37になりません😩😩余弦定理です
2
6² = ²² - 2 ca
b2=52+2-2.5.12×1
b² = 25+2=9.5. 12x
6² = 27-2 × 5√2 × 1 = 1/2 1²
6² = 25× 51/2² 10
6²
Q a = √2, c= 5, B = 135 ac b
Cos B
=
125
5√5 ?
21250
51125 X 10
5125
5
5110
+
√2
A
51125
5125
C
√2
135
A. √37
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