document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=358056>Question 358056</A>: <I><SPAN STYLE=\"word-break: break-all;\"> sec theda - cos theda = sin thedacos theda </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #255602 by </B><A HREF=/tutors/aboutme.mpl?userid=nyc_function><B>nyc_function(2741)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nyc_function><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=nyc_function><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=255602\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The word is theta not theda.\r<BR>\n" );
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document.write( "You did not say whay exactly needs to be done here but my guess is proving trig identities.\r<BR>\n" );
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document.write( "When proving trig identities, convert everything to sine and cosine.\r<BR>\n" );
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document.write( "sec&#952; - cos&#952; = sin&#952;cos&#952;\r<BR>\n" );
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document.write( "We know that sec&#952; = 1/cos&#952;.\r<BR>\n" );
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document.write( "So, replace sine theta with 1/cos theta.\r<BR>\n" );
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document.write( "1/cos&#952; - cos&#952; = sin&#952;cos&#952;\r<BR>\n" );
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document.write( "On the left side, we simply apply the rules for subtraction of fractions.\r<BR>\n" );
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document.write( "The left side becomes (1 - cos^2&#952;)/cos&#952;.\r<BR>\n" );
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document.write( "The equation now looks like this:\r<BR>\n" );
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document.write( "(1 - cos^2&#952;)/cos&#952; = sin&#952;cos&#952;\r<BR>\n" );
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document.write( "Can you take it from here?\r<BR>\n" );
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