AP EAMCET · Maths · Properties of Triangles
If \(\triangle A B C\) is right angled at \(A\), then \(r_2+r_3\) is equal to
- A \(r_1-r\)
- B \(r_1+r\)
- C \(r-r_1\)
- D \(R\)
Answer & Solution
Correct Answer
(A) \(r_1-r\)
Step-by-step Solution
Detailed explanation
Given that \(\angle A=90^{\circ}\) Now, \[ r_2+r_3=4 R \cos \frac{A}{2} \sin \frac{B}{2} \cos \frac{C}{2}+4 R \cos \frac{A}{2} \]…
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