document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=69491>Question 69491</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Theta = x<BR>\n" );
document.write( "If x is an acute angle with cos x = 1/9, find the exact value of sin a/2. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #49482 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=49482\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Theta = x<BR>\n" );
document.write( "If x is an acute angle with cos x = 1/9, find the exact value of sin a/2.<BR>\n" );
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document.write( "COMMENT: I'm going to assume your \"sin a/2\" should be sin x/2.<BR>\n" );
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document.write( "sin(x/2) = sqrt[(1-cos(x))/2]<BR>\n" );
document.write( "sin(x/2) = sqrt[(1-(1/9))/2]<BR>\n" );
document.write( "sin(x/2) = sqrt[8/18]=sqrt(4/9)=2/3<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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