document.write( "Question 813090: prove identity
\n" ); document.write( "(2tanx)(secx)= 1/1-sinx - 1/1+sinx
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Algebra.Com's Answer #489493 by lwsshak3(11628)\"\" \"About 
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prove identity
\n" ); document.write( "(2tanx)(secx)= 1/1-sinx - 1/1+sinx
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\n" ); document.write( "\"2tan%28x%29sec%28x%29=1%2F%281-sin%28x%29%29-1%2F%281%2Bsin%28x%29%29\"
\n" ); document.write( "Start with right side:
\n" ); document.write( "\"1%2F%281-sin%28x%29%29-1%2F%281%2Bsin%28x%29%29\"
\n" ); document.write( "LCD:(1+sin(x))(1-sin(x))=1-sin^2(x)
\n" ); document.write( "\"%28%281%2Bsin%28x%29%29-%281-sin%28x%29%29%29%2F%281-sin%28x%29%29%281%2Bsin%28x%29%29\"
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\n" ); document.write( "\n" ); document.write( "verified: right side=left side
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