document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=430780>Question 430780</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please any answer is appreciated for the following:\r<BR>\n" );
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document.write( "Prove that cos[3*pi/2 + x] = sinx\r<BR>\n" );
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document.write( "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 #299110 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=299110\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using the addition formula for cosine:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%283pi%2F2+%2B+x%29+=+cos%283pi%2F2%29cos%28x%29+-+sin%283pi%2F2%29sin%28x%29 ALIGN=MIDDLE  ALT=\"cos%283pi%2F2+%2B+x%29+=+cos%283pi%2F2%29cos%28x%29+-+sin%283pi%2F2%29sin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%283pi%2F2%29+=+0 ALIGN=MIDDLE  ALT=\"cos%283pi%2F2%29+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%283pi%2F2%29+=+-1 ALIGN=MIDDLE  ALT=\"sin%283pi%2F2%29+=+-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >,\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%283pi%2F2+%2B+x%29+=+0%2Acos%28x%29+-+%28-1%29%28sin%28x%29%29 ALIGN=MIDDLE  ALT=\"cos%283pi%2F2+%2B+x%29+=+0%2Acos%28x%29+-+%28-1%29%28sin%28x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28x%29 ALIGN=MIDDLE  ALT=\"sin%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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