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# Can someone answer my last question. I really need to know this stuff for my trig test. How to remember the law of cosines? c squared equals b squared + a

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Can someone answer my last question. I really need to know this stuff for my trig test. How to remember the law of cosines? c squared equals b squared + a squared or something.

Mar 8, 2016

for finding angles $$Cos(A)=b^2+c^2-a^2\over 2bc$$