In a \[\Delta ABC,\]if \[\frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13}\], then \[\cos C=\] [Karnataka CET 2003]

In a \[\Delta ABC,\]if \[\frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13}\

1.	In a \[\Delta ABC,\]if \[\frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13}\], then \[\cos C=\] [Karnataka CET 2003]
A.	\[\frac{7}{5}\]
B.	\[\frac{5}{7}\]
C.	\[\frac{17}{36}\]
D.	\[\frac{16}{17}\]
Answer» C. \[\frac{17}{36}\]

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In a \[\Delta ABC,\]if \[\frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13}\], then \[\cos C=\] [Karnataka CET 2003]

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