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Cosine Rule

In a triangle...

Question

In a triangle ABC, if b + c = 3a , then the value of is:

A

$2$

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B

\frac{1}{2}

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C

$\frac{1}{3}$

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D

$3$

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Solution

The correct option is A
$2$

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Similar questions

△ A B C

A, B

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