document.write( "Question 537416: how to show the proof of tangent squared x = 2(secant squared x)-tangent squared x \n" ); document.write( "
Algebra.Com's Answer #352879 by Alan3354(69443)\"\" \"About 
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tangent squared x = 2(secant squared x)-tangent squared x
\n" ); document.write( "2 tan^2 = 2sec^2
\n" ); document.write( "They're not equal.
\n" ); document.write( "
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