document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=984820>Question 984820</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you help me please ;Given;  sin (x+y) = sin x cos y + cos x sin y   and  cos (× + y)= cos x cos y - sin x  sin y.    If sin x = 0,8 and sin y= 0,6 , calculate sin ( 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 #605638 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=605638\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> to do this we need cos x and cos y<BR>\n" );
document.write( "sin^2x+cos^2x=1<BR>\n" );
document.write( ".64 +cos^2= 1<BR>\n" );
document.write( "cos^2x =0.36; cos x=0.6<BR>\n" );
document.write( "In the same way sin y=0.6; cos y=0.8<BR>\n" );
document.write( ";;<BR>\n" );
document.write( "sin (x+y)=0.64+0.36=1<BR>\n" );
document.write( "x=53.1 deg<BR>\n" );
document.write( "y=36.9 deg<BR>\n" );
document.write( "sin 90=1<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );