AP EAMCET · Maths · Properties of Triangles
If \(\triangle A B C, \cos A+\cos B+\cos C=\)
- A \(1+\frac{r}{2 R}\)
- B \(1-\frac{r}{\mathrm{R}}\)
- C \(1+\frac{\mathrm{R}}{r}\)
- D \(1+\frac{r}{\mathrm{R}}\)
Answer & Solution
Correct Answer
(D) \(1+\frac{r}{\mathrm{R}}\)
Step-by-step Solution
Detailed explanation
Since,\(\cos A+\cos B+\cos C\)…
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