document.write( "Question 694247: Prove the following identity algebraically:
\n" ); document.write( "sec x - cos x = sin x tan x.\r
\n" ); document.write( "\n" ); document.write( "I came across this question and I do not understand how to get the answer. \n" ); document.write( "

Algebra.Com's Answer #427807 by mouk(232) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+sec+x+-+cosx+=+1%2Fcosx+-+cosx+\"$
\n" ); document.write( " $\"+sec+x+-+cosx+=+%281-+cos%5E2%28x%29%29%2Fcosx+\"$
\n" ); document.write( " $\"+sec+x+-+cosx+=+sin%5E2%28x%29%2Fcosx+\"$
\n" ); document.write( " $\"+sec+x+-+cosx+=+%28sinx+sinx%29%2Fcosx+\"$
\n" ); document.write( " $\"+sec+x+-+cosx+=+sinx+tanx%29+\"$ QED \n" ); document.write( "

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