Proof of the law of sines and the law of cosines - PDF document

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Uploaded On 2017-03-28

Proof of the law of sines and the law of cosines - PPT Presentation

A B C D b a h x c x FromtherighttriangleADCwededucex2h2b21andcosAx bxbcosA2FromtherighttriangleBDCwededucecx2h2a2a2c22cxx2h23Substitutingequations1and2into3wegeta2 ID: 332040

A B C D b a h x c x FromtherighttriangleADC wededucex2+h2=b2(1)andcosA=x b=)x=bcosA:(2)FromtherighttriangleBDC wededuce(cx)2+h2=a2=)a2=c22cx+(x2+h2):(3)Substitutingequations(1)and(2)into(3) wegeta2=

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