document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1137289>Question 1137289</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Graph each pair of parametric equations.<BR>\n" );
document.write( "(2 points each)\r<BR>\n" );
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document.write( "x = 3 sin3t<BR>\n" );
document.write( "y = 3 cos3t\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #755176 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=755176\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br> <BR>\n" );
document.write( "Square the expressions for both x and y and then use the Pythagorean identity<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28x%29%5E2%2Bcos%28x%29%5E2+=+1 ALIGN=MIDDLE  ALT=\"sin%28x%29%5E2%2Bcos%28x%29%5E2+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+=+9sin%5E2%283t%29 ALIGN=MIDDLE  ALT=\"x%5E2+=+9sin%5E2%283t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2+=+9cos%5E2%283t%29 ALIGN=MIDDLE  ALT=\"y%5E2+=+9cos%5E2%283t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2By%5E2+=+9%28sin%5E2%283t%29%2Bcos%5E2%283t%29%29+=+9%281%29+=+9 ALIGN=MIDDLE  ALT=\"x%5E2%2By%5E2+=+9%28sin%5E2%283t%29%2Bcos%5E2%283t%29%29+=+9%281%29+=+9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The equation is<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2By%5E2+=+9 ALIGN=MIDDLE  ALT=\"x%5E2%2By%5E2+=+9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "which you surely know is a circle with center at the origin and radius 3. </SPAN>\n" );
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