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)![]() ![]() ![]() You can put this solution on YOUR website! If cos theta = -8/9 and theta is in quadrant 3 find sin theta \n" ); document.write( "------ \n" ); document.write( "In QIII both x and y a re negative. \n" ); document.write( "--------------------------------------- \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) \n" ); document.write( "--------- \n" ); document.write( "Ans: sin(t) = y/r = -sqrt(17)/9 \n" ); document.write( "------------ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "---------- \n" ); document.write( " |