document.write( "Question 1009075: If cos theta = -8/9 and theta is in quadrant 3 find sin theta \n" ); document.write( "
Algebra.Com's Answer #624611 by stanbon(75887)\"\" \"About 
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If cos theta = -8/9 and theta is in quadrant 3 find sin theta
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\n" ); document.write( "In QIII both x and y a re negative.
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\n" ); document.write( "By definition cos(t) = x/r.
\n" ); document.write( "So x = -8 and r = 9
\n" ); document.write( "Then y = -sqrt[9^2-8^2] = -sqrt(17)
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\n" ); document.write( "Ans: sin(t) = y/r = -sqrt(17)/9
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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