In the given figure below, as per law of cosine which is the correct formula

a²=b²+c²-2bc.cos B

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a²=b²-c²-2bc.cos A

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a²=b²+c²+2bc.cos A

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a²=b²+c²-2bc.cos A

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Solution

The correct option is D
a²=b²+c²-2bc.cos A

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In the given figure below, as per law of cosine which is the correct formula

The correct option is D a2=b2+c2-2bc.cos A

The correct option is D
a²=b²+c²-2bc.cos A