AP EAMCET · Maths · Properties of Triangles
In any triangle , equals
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Given b+ccosA+c+acosB+a+bcosC =bcosA+ccosA+ccosB+acosB+acosC+bcosC =bcosA+acosB+ccosA+acosC+ccosB+bcosC ...1 By projection formula, we have a=bcosC+ccosB Therefore, from 1, we have =a+b+c
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