document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=720972>Question 720972</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve all equations for (0, 2pi)\r<BR>\n" );
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document.write( "sin(x + (pi/4)) + sin(x - (pi/4)) = 1<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442149 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=442149\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve all equations for (0, 2pi) <BR>\n" );
document.write( "sin(x + (pi/4)) + sin(x - (pi/4)) = 1<BR>\n" );
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document.write( "Using sin addition identities:<BR>\n" );
document.write( "sin(x+&#960;/4)=sinxcos(&#960;/4)+cosxsin(&#960;/4)<BR>\n" );
document.write( "sin(x-&#960;/4)=sinxcos(&#960;/4)-cosxsin(&#960;/4)<BR>\n" );
document.write( "sinxcos(&#960;/4)+cosxsin(&#960;/4)+sinxcos(&#960;/4)-cosxsin(&#960;/4)=1<BR>\n" );
document.write( "2sinxcos(&#960;/4)=1<BR>\n" );
document.write( "2sinx&#8730;2/2=1<BR>\n" );
document.write( "sinx=1/&#8730;2=&#8730;2/2<BR>\n" );
document.write( "x=&#960;/4, 3&#960;/4 (in quadrants I and II where sin>0) </SPAN>\n" );
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