AP EAMCET · Maths · Properties of Triangles
In a triangle
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Recall that cotA2=ss-a∆ and r1=∆s-a. i.e. r1cotA2+r2cotB2+r3cotC2=∆s-a×ss-a∆+∆s-b×ss-b∆+∆s-c×ss-c∆ =3s
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