Question:medium
In triangle ABC, $(a^2+b^2)\cos A + (b^2+c^2)\cos B + (c^2+a^2)\cos C$ is equal to
In triangle ABC, $(a^2+b^2)\cos A + (b^2+c^2)\cos B + (c^2+a^2)\cos C$ is equal to
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Use cosine law and simplify using $a^2+b^2+c^2$ relations.
Updated On: Apr 8, 2026
- $abc$
- $2abc$
- $3abc$
- $4abc$
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The Correct Option is C
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