document.write( "Question 483793: Hi I have another question I would like to verify my answer to:\r
\n" ); document.write( "\n" ); document.write( "In Δ ABC, find the value of ∠C, if a = 5.7 m, b = 3.9 m, and c = 7.7 m.\r
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Algebra.Com's Answer #331073 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Use the law of cosines\r\n" );
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document.write( "\"cos%28C%29=%28a%5E2%2Bb%5E2-c%5E2%29%2F%282ab%29\"\r\n" );
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document.write( "\"cos%28C%29=%285.7%5E2%2B3.9%5E2-7.7%5E2%29%2F%282%285.7%29%283.9%29%29\"\r\n" );
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document.write( "\"cos%28C%29=%2832.49%2B15.21-59.29%29%2F44.46\"\r\n" );
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document.write( "\"cos%28C%29=%28-11.59%29%2F44.46\"\r\n" );
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document.write( "\"cos%28C%29+=+-.2606837607\"\r\n" );
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document.write( "Use the inverse cosine function on your calculator,\r\n" );
document.write( "being sure it is in degree mode, not radian mode.\r\n" );
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document.write( "\"C+=+%22105.1106379%B0%22\"\r\n" );
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document.write( "to the nearest whole degree is 105°\r\n" );
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document.write( "Edwin
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