document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=808724>Question 808724</A>: <I><SPAN STYLE=\"word-break: break-all;\"> State the formula for sin(a + b) and use it to show sin(a + 3&#960;/2) = &#8722; cos(a) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #487167 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=487167\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  State the formula for sin(a + b) and use it to show sin(a + 3&#960;/2) = &#8722; cos(a)<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "sin(a + b) = sin(a)cos(b) + cos(a)sin(b)<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "sin(a+(3pi/2)) sin(a)cos(3pi/2) + cos(a)(sin(3pi/2))<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "= (sin(a))*0 + cos(a)(-1)<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "= 0 - cos(a)<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "= -cos(a)<BR>\n" );
document.write( "================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================ </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );