TS EAMCET · Maths · Properties of Triangles
In a
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
We have to find the value of cos2B-C2(b+c)2+sin2B-C2(b-c)2, We know that, in a triangle, a=2RsinA, b=2RsinB and c=2RsinC Substituting them, cos2B-C2(b+c)2+sin2B-C2(b-c)2=cos2B-C22R· sin B+2R· sin C2+sin2B-C22R· sin B-2R&…
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