In a \( \triangle A B C \) with fixed base \( B C \), the vertex \(... VIDEO
In a \( \triangle A B C \) with fixed base \( B C \), the vertex \( A \) moves such that \( \cos B+\cos C=4 \sin ^{2} \frac{A}{2} \).If \( a, b \) and \( c \) denotehttps://bit.ly/YTAI_PWAP https://www.pw.live
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