document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=923632>Question 923632</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose sin x = 1/7<BR>\n" );
document.write( "cos x > 0, sin y = &#8722;2/5<BR>\n" );
document.write( "and cos y < 0. Then <BR>\n" );
document.write( "cos x = <BR>\n" );
document.write( "cos y = <BR>\n" );
document.write( "Find each of the following quantities: <BR>\n" );
document.write( "sin(x + y) = <BR>\n" );
document.write( "cos(x + y) = <BR>\n" );
document.write( "tan(x + y) = </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #560186 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=560186\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sin x = 1/7,  cos x > 0, cos x = 4&#8730;3 /7 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%287%5E2+-+1%5E2%29+=+sqrt%2848%29 ALIGN=MIDDLE  ALT=\"sqrt%287%5E2+-+1%5E2%29+=+sqrt%2848%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".......<BR>\n" );
document.write( " sin y = &#8722;2/5, and cos y < 0, cosy = &#8730;21 / 5  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%285%5E2+-+2%5E2%29+=+sqrt%2821%29 ALIGN=MIDDLE  ALT=\"sqrt%285%5E2+-+2%5E2%29+=+sqrt%2821%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "........Plug and Play<BR>\n" );
document.write( "sin(x + y) = sin x cos y + sin y cos x<BR>\n" );
document.write( "sin(x + y) = (1/7)(&#8730;21 /5)  + (-2/5)(4&#8730;3 /7) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );