document.write( "Question 851696: Find the value of cosx and sinx, given cosx=3/8 and secx<0 \n" ); document.write( "
Algebra.Com's Answer #512931 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Find the value of cosx and sinx, given cosx = -3/8 and secx<0 \n" ); document.write( "---------- \n" ); document.write( "Note: If sec(x) < 0, cos(x) is also < 0 \n" ); document.write( "But sin(x) could be positive (QII) or negative(QIII). \n" ); document.write( "------------ \n" ); document.write( "Since cos(x) = 3/8, sin(x) = sqrt(8^2-3^2)/8 = + or -sqrt(55)/8 \n" ); document.write( "============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============== \n" ); document.write( " |