document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=679509>Question 679509</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find all solutions if \r<BR>\n" );
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document.write( "0_< theta < 360 \r<BR>\n" );
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document.write( "sin^2(2)x - 4sin2x - 1 = 0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #421985 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=421985\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> find all solutions if <BR>\n" );
document.write( "0_< theta < 360 <BR>\n" );
document.write( "sin^2(2)x - 4sin2x - 1 = 0<BR>\n" );
document.write( "solve for sin(2x) using following quadratic formula:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a=1, b=-4, c=-1<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "sin(2x)=4.236 (reject, -1 &#8804; sin(2x) &#8804; 1)<BR>\n" );
document.write( "or<BR>\n" );
document.write( "sin(2x)&#8776;-0.236<BR>\n" );
document.write( "2x&#8776;193.65º and 346.35º (in quadrants III and IV where sin<0<BR>\n" );
document.write( "x=96.82º and 173.18º </SPAN>\n" );
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