Mathematics
Senior High
線引いてあるところ、どーなってイコールの右のようになるんですか？🙇♂️
余弦定理により
OSI ebot &
cos C=
LEV
=
{(1+√3)k)²+(2k)²-(√√2 k)²
2.(1+√3)k-2k
M=
ES
(6+2√3)k²
2
4(1+√3) k²
√√3
2
2√3 (√3+1)
4(1+√3)
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