document.write( "Question 1138396: If theta is a third quadrant angle and cos theta = -2/3, find sin theta. \n" ); document.write( "

Algebra.Com's Answer #756200 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
The sin is also negative in the 3rd quadrant
\n" ); document.write( "Find vertical coordinate
\n" ); document.write( " $\"+b%5E2+=+3%5E2+-+%28-2%29%5E2+\"$
\n" ); document.write( " $\"+b%5E2+=+9+-+4+\"$
\n" ); document.write( " $\"+b%5E2+=+5+\"$
\n" ); document.write( " $\"+b+=+-sqrt%285%29+\"$
\n" ); document.write( "------------------------
\n" ); document.write( " $\"+sin%28+theta+%29+=+-sqrt%285%29%2F3+\"$
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