document.write( "Question 1033489: If cos theta equals -4/9 with theta in quadrant 2, find sin theta. \n" ); document.write( "
Algebra.Com's Answer #648127 by ikleyn(52787)\"\" \"About 
You can put this solution on YOUR website!
.
\n" ); document.write( "If cos theta equals -4/9 with theta in quadrant 2, find sin theta.
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"sin%28theta%29\" = +\"sqrt%281+-+cos%5E2%28theta%29%29\" = \"sqrt%281-%28-4%2F9%29%5E2%29\" = \"sqrt%281+-+16%2F81%29\" = \"sqrt%28%2881-16%29%2F81%29\" = \"sqrt%2865%2F81%29\" = \"sqrt%2865%29%2F9\".\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The sign is \"+\" since \"theta\" is in quadrant 2, where sine is positive.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );