TS EAMCET · Maths · Properties of Triangles
In a , if , and the area of the triangle is sq. units, then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
We have, acos2C2+ccos2A2=15 ⇒a1+cosC2+c1+cosA2=15 ⇒a+c+acosC+ccosA=30 ⇒a+b+c=30 ⇒a+c=20 ⇒s=15 ...1 Now ∆=153=ss-as-bs-c ⇒225×3=15×15-a×5×15-c ⇒ac=84 ...2 also…
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