I got into an argument with a mathematics grad student about the law of sines. He said that he has proven it to be wrong several times. I don't see how this is possible, given that the angles are opposing the sides, it doesn't seem possible for it to be EVER incorrect.(adsbygoogle = window.adsbygoogle || []).push({});

I asked him to prove it for me but he said he didn't have time.

Does anyone know about this being invalid?

In my years of studying engineering, I have NEVER found the law of sines to give me a false answer.

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# Law of sines

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