document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=551282>Question 551282</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I've been having some problems trying to solve this,<BR>\n" );
document.write( "sin(x+pi/4) + sin(x-pi/4) = 1   for the interval [0,2pi]<BR>\n" );
document.write( "I don't really even know where to start, I think it has something to do with co-function identities, but I don't know how to translate that since it's pi/4 and not pi/2... <BR>\n" );
document.write( "Help is greatly appreciated, Thank you for your time\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "sin(x+pi/4) + sin(x-pi/4) = 1   for the interval [0,2pi]     </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #359603 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=359603\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I've been having some problems trying to solve this,<BR>\n" );
document.write( "sin(x+pi/4) + sin(x-pi/4) = 1 for the interval [0,2pi]<BR>\n" );
document.write( "**<BR>\n" );
document.write( "sin(x+pi/4) + sin(x-pi/4) = 1<BR>\n" );
document.write( "Addition formulas for sin:<BR>\n" );
document.write( "sin(s+t)=sin s cos t + cos s sin t<BR>\n" );
document.write( "sin(s-t)=sin s cos t - cos s sin t<BR>\n" );
document.write( "..<BR>\n" );
document.write( "sin(x+&#960;/4)=sin x cos &#960;/4 + cos x sin &#960;/4<BR>\n" );
document.write( "=sin x*&#8730;2/2+cos x*&#8730;2/2=&#8730;2/2 sin x + &#8730;2/2 cos x<BR>\n" );
document.write( "..<BR>\n" );
document.write( "sin(x-&#960;/4)=sin x cos &#960;/4 - cos x sin &#960;/4<BR>\n" );
document.write( "=sin x*&#8730;2/2-cos x*&#8730;2/2=&#8730;2/2 sin x - &#8730;2/2 cos x<BR>\n" );
document.write( "..<BR>\n" );
document.write( "&#8730;2/2 sin x + &#8730;2/2 cos x + &#8730;2/2 sin x - &#8730;2/2 cos x=1<BR>\n" );
document.write( "&#8730;2 sin x=1<BR>\n" );
document.write( "sin x=1/&#8730;2<BR>\n" );
document.write( "x=&#960;/4\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );