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Chứng minh a=(P.sinA/2)/(cosB/2.cosC/2)

Chứng minh a=(P.sinA/2)/(cosB/2.cosC/2)
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Chứng minh a=(P.sinA/2)/(cosB/2.cosC/2)

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User AaronI
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Answer:

I can't understand your question friend.

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User Reggie
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