In \( a \triangle A B C, 2 \cos \frac{A-C}{2}=\frac{a+c}{\sqrt{a^{2}+c^{2}-a c}} \). Then
(a) \(... VIDEO
In \( a \triangle A B C, 2 \cos \frac{A-C}{2}=\frac{a+c}{\sqrt{a^{2}+c^{2}-a c}} \). Thenhttps://bit.ly/YTAI_PWAP https://www.pw.live
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