document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=900778>Question 900778</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove the identity ;\r<BR>\n" );
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document.write( "(Cosx / 1 -sinx) - ( cosx / 1 +sinx) = 2tanx  </SPAN>\n" );
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