document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=962780>Question 962780</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using a sum or difference identity, write the following as an expression involving functions of x. \r<BR>\n" );
document.write( "\n" );
document.write( " sin(x- pie/2)\r<BR>\n" );
document.write( "\n" );
document.write( "A) sin x<BR>\n" );
document.write( "B) sqrt2/2cosx- sqrt2/2 sinx<BR>\n" );
document.write( "C)-cosx<BR>\n" );
document.write( "D)sqrt2/2 cosx+ sqrt2/2 sinx </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #588249 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=588249\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using a sum or difference identity, write the following as an expression involving functions of x. <BR>\n" );
document.write( "sin(x- pie/2) <BR>\n" );
document.write( "A) sin x<BR>\n" );
document.write( "B) sqrt2/2cosx- sqrt2/2 sinx<BR>\n" );
document.write( "C)-cosx<BR>\n" );
document.write( "D)sqrt2/2 cosx+ sqrt2/2 sinx<BR>\n" );
document.write( "***<BR>\n" );
document.write( "sin(x-&#960;/2)=sinxcos(&#960;/2)-cosxsin(&#960;/2)<BR>\n" );
document.write( "=sinx*0-cosx*1=-cosx<BR>\n" );
document.write( "ans: C) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );