document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=768931>Question 768931</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, i'm having trouble on starting this identity. \r<BR>\n" );
document.write( "\n" );
document.write( "cos(x-(3pi/2))+cos(x-(3pi/2)) = 0\r<BR>\n" );
document.write( "\n" );
document.write( "i have already plugged in a value to see if it is a real identity and it is.\r<BR>\n" );
document.write( "\n" );
document.write( "please help. thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #468564 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</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=468564\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
document.write( "\n" );
document.write( "since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x-%283pi%2F2%29%29+=+-sin%28x%29+ ALIGN=MIDDLE  ALT=\"cos%28x-%283pi%2F2%29%29+=+-sin%28x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, we have\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x-%283pi%2F2%29%29+%2Bcos%28x-%283pi%2F2%29%29+=+-2+sin%28x%29 ALIGN=MIDDLE  ALT=\"cos%28x-%283pi%2F2%29%29+%2Bcos%28x-%283pi%2F2%29%29+=+-2+sin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2+sin%28x%29=+0 ALIGN=MIDDLE  ALT=\"-2+sin%28x%29=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" > for all <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+pi%2A+n ALIGN=MIDDLE  ALT=\"x+=+pi%2A+n\"   DISABLED_style= \"max-width:90%; height:auto;\" >, where <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n ALIGN=MIDDLE  ALT=\"+n\"   DISABLED_style= \"max-width:90%; height:auto;\" > element <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Z ALIGN=MIDDLE  ALT=\"Z\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28pi%29=0 ALIGN=MIDDLE  ALT=\"sin%28pi%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > we can use any number <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n ALIGN=MIDDLE  ALT=\"n\"   DISABLED_style= \"max-width:90%; height:auto;\" >, result will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0 ALIGN=MIDDLE  ALT=\"0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "for example if <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n=1 ALIGN=MIDDLE  ALT=\"n=1\"   DISABLED_style= \"max-width:90%; height:auto;\" >, then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28pi%29+=+0 ALIGN=MIDDLE  ALT=\"sin%28pi%29+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >, as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%282pi%29=0 ALIGN=MIDDLE  ALT=\"sin%282pi%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > as well, and so on </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );