document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=812506>Question 812506</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given cos(alpha) = 6/7, 0 < alpha > pi/2, find the exact value of cos(alpha/2) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #489189 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=489189\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given cos(alpha) = 6/7, 0 < alpha > pi/2, <BR>\n" );
document.write( "find the exact value of cos(alpha/2)<BR>\n" );
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document.write( "cos(a/2) = sqrt[(1+cos(a))/2]<BR>\n" );
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document.write( "Your Problem:<BR>\n" );
document.write( "cos(a/2) = sqrt[(1+(6/7))/2] = sqrt[(13/7)/2] = sqrt(13/14)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );