document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=852899>Question 852899</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you evaluate the following expression without using a calculator?\r<BR>\n" );
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document.write( "64^cos^2(x)=8<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #513749 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=513749\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How do you evaluate the following expression without using a calculator?\r<BR>\n" );
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document.write( "64^cos^2(x)=8<BR>\n" );
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document.write( "cos^2(x) = 1/2<BR>\n" );
document.write( "cos(x) = sqrt(2)/2<BR>\n" );
document.write( "x = pi/4, 7pi/4 + 2n*pi, n = 0,1,2,3... </SPAN>\n" );
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