document.write( "Question 288700: The lengths of the sides of ABC are 9.5, 12.8, and 13.7.\r
\n" ); document.write( "\n" ); document.write( "(a) To the nearest hundredth of a degree, the measure of the smallest angle in the triangle is .
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Algebra.Com's Answer #209230 by texttutoring(324)\"\" \"About 
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What grade is this? Have you seen the Cosine Law before?\r
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\n" ); document.write( "\n" ); document.write( "The Cosine Law is:\r
\n" ); document.write( "\n" ); document.write( "\"c%5E2=a%5E2%2Bb%5E2-2abCos%280%29\"\r
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\n" ); document.write( "\n" ); document.write( "To find the smallest angle, o, we need to use c as the smallest side, 9.5. Plug the numbers in with a=12.8, b=13.7 and c=9.5, then solve for the angle, o.\r
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\n" ); document.write( "\n" ); document.write( "\"%289.5%29%5E2=%2812.8%29%5E2%2B%2813.7%29%5E2-2%2812.8%29%2813.7%29Cos%28o%29\"\r
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\n" ); document.write( "\n" ); document.write( "Rearrange this equation to find:\r
\n" ); document.write( "\n" ); document.write( "\"Cos%28o%29+=+-261.28%2F-350.72\"
\n" ); document.write( "o=41.84 degrees\r
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\n" ); document.write( "\n" ); document.write( "If you need any clarifications about steps in this problem, let me know!
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