document.write( "Question 1057128: prove this identity
\n" ); document.write( "1+ sin x/ cos x +cos x/ 1 + sin x = 2secx \n" ); document.write( "

Algebra.Com's Answer #672292 by ikleyn(52782) $\"\"$ $\"About$

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\n" ); document.write( "prove this identity
\n" ); document.write( "1+ sin x/ cos x +cos x/ 1 + sin x = 2secx
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document.write( " =  =  = \r\n" );
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document.write( " =        ( <--- use  = 1 )\r\n" );
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document.write( "=  =   =  =  = 2*sec(x).\r\n" );
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document.write( "QED.\r\n" );
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