In a ABC, a(b^2+c^2) A+b(c^2+a^2) B+c(a^2+b^2) C is equal to

JEE Main Mathematics question

Not in JEE syllabus

In a , is equal to

Answer: (C)

Substitute the cosine rule, , so the sum is . Write , , : the numerator is

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Question ID VK-008480