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)\"\" \"About 
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( ":)
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