If in triangle \( A B C, a, b, c \) and angle \( A \) are given and \( c \sin Aac \), then \( \l...

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If in triangle \( A B C, a, b, c \) and angle \( A \) are given and \( c \sin Aac \), then \( \left(b_{1}\right. \) and \( b_{2} \) are values of \( \left.b\right) \)
\( \mathrm{P} \)
(a) \( b_{1}+b_{2}=2 c \cos A \)
(b) \( b_{1}+b_{2}=c \cos A \)
W.
(c) \( b_{1} b_{2}=c^{2}-a^{2} \)
(d) \( b_{1} b_{2}=c^{2}+a^{2} \)
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