AP EAMCET · Maths · Properties of Triangles
In \(\triangle A B C\), if \(a=13, b=14\) and \(\cos \frac{C}{2}=\frac{3}{\sqrt{13}}\), then \(2 r_1=\)
- A 2 s
- B \(\Delta\)
- C s
- D \(2 \Delta\)
Answer & Solution
Correct Answer
(C) s
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \text { } a=13, b=14, \cos \frac{C}{2}=\frac{3}{\sqrt{13}} \\ & s=\frac{a+b+c}{2} \Rightarrow s=\frac{27+c}{2}\end{aligned}\)…
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