document.write( "Question 252654: Given triangle ABC with a=12,b=10 and c=8 find the angles in degrees and minutes. \n" ); document.write( "
Algebra.Com's Answer #184683 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
Given triangle ABC with a=12,b=10 and c=8 find the angles in degrees and minutes
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document.write( "\"cos%28A%29+=+%28b%5E2%2Bc%5E2-a%5E2%29%2F%282bc%29\"\r\n" );
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document.write( "\"cos%28A%29+=+%2810%5E2%2B8%5E2-12%5E2%29%2F%282%2A10%2A8%29\"\r\n" );
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document.write( "\"cos%28A%29+=+%28100%2B64-144%29%2F%28160%29\"\r\n" );
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document.write( "\"cos%28A%29+=+20%2F160=1%2F8=0.125\"\r\n" );
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document.write( "\"A+=+%2282.81924422%B0%22+=+%2282%B049%27%22\" \r\n" );
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document.write( "----------------------------------------\r\n" );
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document.write( "\"cos%28B%29+=+%28a%5E2%2Bc%5E2-b%5E2%29%2F%282ac%29\"\r\n" );
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document.write( "\"cos%28B%29+=+%2812%5E2%2B8%5E2-10%5E2%29%2F%282%2A12%2A8%29\"\r\n" );
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document.write( "\"cos%28B%29+=+%28144%2B64-100%29%2F%28192%29\"\r\n" );
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document.write( "\"cos%28B%29+=+108%2F192=9%2F16=0.5625\"\r\n" );
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document.write( "\"B+=+%2255.77113367%B0%22+=+%2255%B046%27%22\"\r\n" );
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document.write( "----------------------------------------\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+=+%2812%5E2%2B10%5E2-8%5E2%29%2F%282%2A12%2A10%29\"\r\n" );
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document.write( "\"cos%28C%29+=+%28144%2B100-64%29%2F240\"\r\n" );
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document.write( "\"cos%28C%29+=+180%2F240=3%2F4=.75\"\r\n" );
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document.write( "\"C+=+%2241.40962211%B0%22+=+%2241%B025%27%22\"\r\n" );
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document.write( "Checking:\r\n" );
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document.write( " 82° 49'\r\n" );
document.write( " 55° 46'\r\n" );
document.write( " 41° 25'\r\n" );
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document.write( "178°120' = 180°\r\n" );
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document.write( "Edwin
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