document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=73943>Question 73943</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0534494498/algebrahomeworkh>Algebra and Trigonomerty</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Find all solutions in the interval [0,2PI] to the equation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E%282%29%28x=1%29 ALIGN=MIDDLE  ALT=\"cos%5E%282%29%28x=1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "a. x = 0, PI/2<BR>\n" );
document.write( "b. x = 0, PI<BR>\n" );
document.write( "c. x = PI/2 3PI/2<BR>\n" );
document.write( "d. x = 0, PI/2, PI, PI/2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #52984 by </B><A HREF=/tutors/aboutme.mpl?userid=ffc_01><B>ffc_01(9)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ffc_01><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=52984\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I think the question was supposed to be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%282x%29=1 ALIGN=MIDDLE  ALT=\"cos%282x%29=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "In which case...\r<BR>\n" );
document.write( "\n" );
document.write( "The interval is <BR>\n" );
document.write( "0 < 2x < 2PI these can also be equal<BR>\n" );
document.write( "                0 < x < PI<BR>\n" );
document.write( "and<BR>\n" );
document.write( "cos(2x)= 1 <BR>\n" );
document.write( "2x = 0 and 2PI<BR>\n" );
document.write( " x = 0 and PI </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );