document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=333611>Question 333611</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am super confused with this type of questions.  I would be grateful for your help.  Thanks in advance.<BR>\n" );
document.write( "A) if 0<x<&#960; /2 and tan x = 15/8, cos 2x=<BR>\n" );
document.write( "B) if sin x= 0.2, find cos 2x<BR>\n" );
document.write( "C)find sin 7&#960; /12; how to I get here: (1+&#8730;3)/2&#8730;2<BR>\n" );
document.write( "D) use &#960; /12=(&#960; /3)-(&#960; /4) to find cos &#960; /12\r<BR>\n" );
document.write( "\n" );
document.write( "THANK YOU!!!!!!!!!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #239023 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=239023\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A) if 0 <BR>\n" );
document.write( "What?<BR>\n" );
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document.write( "B) if sin x= 0.2, find cos 2x<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x%29+=+sqrt%281+-+sin%5E2%28x%29%29+=+sqrt%281+-+0.04%29 ALIGN=MIDDLE  ALT=\"cos%28x%29+=+sqrt%281+-+sin%5E2%28x%29%29+=+sqrt%281+-+0.04%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28x%29+=+sqrt%280.96%29 ALIGN=MIDDLE  ALT=\"cos%28x%29+=+sqrt%280.96%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "sin(2x) = 2sin(x)cos(x)<BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A0.2%2Asqrt%280.96%29+=+0.4%2Asqrt%280.96%29 ALIGN=MIDDLE  ALT=\"2%2A0.2%2Asqrt%280.96%29+=+0.4%2Asqrt%280.96%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%282x%29+=+sqrt%281+-+sin%5E2%282x%29%29+=+sqrt%281+-+0.16%2A0.96%29+=+sqrt%280.8464%29 ALIGN=MIDDLE  ALT=\"cos%282x%29+=+sqrt%281+-+sin%5E2%282x%29%29+=+sqrt%281+-+0.16%2A0.96%29+=+sqrt%280.8464%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "cos(2x) = 0.92<BR>\n" );
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document.write( "Repost the others, don't post several problems at one time.  The tutors are much more likely to ignore them if you do.<BR>\n" );
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document.write( "C)find sin 7&#960; /12; how to I get here: (1+&#8730;3)/2&#8730;2<BR>\n" );
document.write( "D) use &#960; /12=(&#960; /3)-(&#960; /4) to find cos &#960; /12 <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );