document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=878832>Question 878832</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the graph of a cosine function has amplitude 4, period 90degrees, and a vertical translation 3 units down. write an equation for the function </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #530367 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=530367\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the graph of a cosine function has amplitude 4, period 90degrees, and a vertical translation 3 units down. write an equation for the function<BR>\n" );
document.write( "***<BR>\n" );
document.write( "Form of equation for cos function: y=Acos(Bx-C)+D, A=amplitude, period=360/B, phase shift=C/B, D=vertical shift.<BR>\n" );
document.write( "For given problem:<BR>\n" );
document.write( "amplitude=4<BR>\n" );
document.write( "period=90&#730;=360/B<BR>\n" );
document.write( "B=4<BR>\n" );
document.write( "C=0<BR>\n" );
document.write( "Phase shift: none<BR>\n" );
document.write( "Vertical shift:3 units down<BR>\n" );
document.write( "Equation: y=4cos(4x)-3 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );