document.write( "Question 1073694: Having difficulties with this problem:\r
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document.write( "SinA = -5/7 and 180° < A < 270° \n" );
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Algebra.Com's Answer #688489 by Edwin McCravy(20065) You can put this solution on YOUR website! \r\n" ); document.write( "\r\n" ); document.write( "180° < A < 270° is the third quadrant.\r\n" ); document.write( "\r\n" ); document.write( "We first find the reference angle, which is the angle\r\n" ); document.write( "whose sine is +5/7.\r\n" ); document.write( "\r\n" ); document.write( "On your TI-84, press 2ND SIN then press 5/7) ENTER\r\n" ); document.write( "\r\n" ); document.write( "Read 45.5846914°, which is the reference angle. To\r\n" ); document.write( "increase it to the desired angle in QIII, we add 180°:\r\n" ); document.write( "\r\n" ); document.write( "A = 225.5846914°\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |