document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=355122>Question 355122</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find cos (theta).<BR>\n" );
document.write( "Given: sin (theta)=1/2<BR>\n" );
document.write( "and (theta) is an acute angle\r<BR>\n" );
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document.write( "I need help with the steps on how to find cos. I thought I had the right formula, but I don't remember how to use it correctly. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #253647 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=253647\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sin^2 + cos^2 = 1<BR>\n" );
document.write( "cos^2 = 1 - sin^2<BR>\n" );
document.write( "cos^2 = 1 - (0.5)^2<BR>\n" );
document.write( "cos^2 = 0.75<BR>\n" );
document.write( "cos = sqrt(.75)<BR>\n" );
document.write( "cos = 0.866\r<BR>\n" );
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document.write( "We also know that a sin of 1/2 on an acute angle is a 30 degree angle.<BR>\n" );
document.write( "What is cos(30)?? </SPAN>\n" );
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