document.write( "Question 577644: What's the Exact Value for Sin 13π/12 degrees ? Without using a calculator \n" ); document.write( "

Algebra.Com's Answer #370237 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+sin%28+%2813%2Api%29%2F12%29+\"$
\n" ); document.write( " $\"+%2813%2Api%29%2F12+\"$ = $\"+%2812%2Api%29%2F12+%2B+%281%2Api%29%2F12+\"$
\n" ); document.write( " $\"+%2812%2Api%29%2F12+=+pi+\"$
\n" ); document.write( " $\"+pi+%2B+pi%2F12+\"$ is in the 3rd quadrant where
\n" ); document.write( "the sine is negative
\n" ); document.write( "In degrees, $\"+pi%2F12+=+180%2F12+\"$
\n" ); document.write( " $\"+180%2F12+=+15+\"$ degrees
\n" ); document.write( "The answer is $\"+-+sin%2815%29+\"$
\n" ); document.write( "( I don't have a calculator ) \n" ); document.write( "

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