document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=746469>Question 746469</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given: A is a positive acute angle and cosA = 4/5.<BR>\n" );
document.write( " Find the exact value of sin(x + pi/2). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #454309 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=454309\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Given: A is a positive acute angle and cosA = 4/5.<BR>\n" );
document.write( "Find the exact value of sin(x + pi/2).<BR>\n" );
document.write( "----<BR>\n" );
document.write( "sin(x+(pi/2)) = sinx*cos(pi/2)+cos(x)*sin(pi/2)<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "= sin(x)*0 + cos(x)*1) <BR>\n" );
document.write( "------<BR>\n" );
document.write( "= 0 + cos(x)<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "= cos(x)<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );