document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=639811>Question 639811</A>: <I><SPAN STYLE=\"word-break: break-all;\"> sin x - cos x =0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #402875 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=402875\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin+x+-+cos+x+=0 ALIGN=MIDDLE  ALT=\"sin+x+-+cos+x+=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "As we can see,  the equation is linear, in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin+x ALIGN=MIDDLE  ALT=\"sin+x\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos+x ALIGN=MIDDLE  ALT=\"cos+x\"   DISABLED_style= \"max-width:90%; height:auto;\" >. The way of solving this kind of equation is to divide entire equation with \"<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos+x ALIGN=MIDDLE  ALT=\"cos+x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\".\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin+x%2Fcos+x+-+cos+x%2Fcos+x+=0%2Fcos+x ALIGN=MIDDLE  ALT=\"sin+x%2Fcos+x+-+cos+x%2Fcos+x+=0%2Fcos+x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sin+x%2F+cos+x%29+-+1+=+0 ALIGN=MIDDLE  ALT=\"%28sin+x%2F+cos+x%29+-+1+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Instead of the ratio <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin+x%2F+cos+x ALIGN=MIDDLE  ALT=\"sin+x%2F+cos+x\"   DISABLED_style= \"max-width:90%; height:auto;\" >, we'll use the resulting function, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tg+x ALIGN=MIDDLE  ALT=\"tg+x\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "The obtained equation is an elementary equation.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tg+x+-+1+=+0 ALIGN=MIDDLE  ALT=\"tg+x+-+1+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tg+x=1 ALIGN=MIDDLE  ALT=\"tg+x=1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=+arctg1+%2Bk%2Api ALIGN=MIDDLE  ALT=\"x=+arctg1+%2Bk%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=+pi%2F4+%2B+k%2Api ALIGN=MIDDLE  ALT=\"x=+pi%2F4+%2B+k%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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