document.write( "Question 766373: sec^4 a+sec^2 a=1 ,prove is it identity or not,thanks and regards \n" ); document.write( "
Algebra.Com's Answer #467306 by tommyt3rd(5050)![]() ![]() You can put this solution on YOUR website! clearly not an identity try a=pi, leads to \n" ); document.write( "2=1\r \n" ); document.write( "\n" ); document.write( ":) \n" ); document.write( " |