document.write( "Question 455175: Use reference angles to find the exact value of the expression, sin 180^ \n" ); document.write( "
Algebra.Com's Answer #312508 by stanbon(75887)\"\" \"About 
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The reference angle for 180 degrees is 0 degrees.
\n" ); document.write( "So sin(180) = sin(0) = 0
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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