TS EAMCET · Maths · Properties of Triangles
In a triangle, if the length of the sides and are three consecutive natural numbers and then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
(cosA+cosB+cosC)2abc =b2+c2-a22bc+a2+c2-b22ac+a2+b2-c22ab2abc =a(b2+c2-a2)+ba2+c2-b2+ca2+b2-c22abc2abc =a(b2+c2-a2)+ba2+c2-b2+ca2+b2-c2 Put a=b-1 & c=b+1 as a,b,c are three consecutive natural numbers & a<b<c.…
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