document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=685691>Question 685691</A>: <I><SPAN STYLE=\"word-break: break-all;\"> simplify the trigonometric equation. <BR>\n" );
document.write( "sec^2 - tan^2 (-x)\r<BR>\n" );
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document.write( "these are my possible answers:<BR>\n" );
document.write( "a. 1<BR>\n" );
document.write( "b. 2sec^2x + 1<BR>\n" );
document.write( "c. -1<BR>\n" );
document.write( "d. tan x<BR>\n" );
document.write( "e. 2 tan^2 + 1\r<BR>\n" );
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document.write( "HELP! thank you! </SPAN>\n" );
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