document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=582435>Question 582435</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If A is a positive acute angle and sin A = the square root of 5/3 what is cos A </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #372052 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=372052\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If A is a positive acute angle and sin A = the square root of 5/3 what is cos A<BR>\n" );
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document.write( "A is in Q1.<BR>\n" );
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document.write( "sin(A) = sqrt(5)/3 <BR>\n" );
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document.write( "But sin(A) = y/4<BR>\n" );
document.write( "So, y = sqrt(5) and r = 4<BR>\n" );
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document.write( "Then x = sqrt[r^2-y^2] = sqrt[16-5] = sqrt(11)<BR>\n" );
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document.write( "cos(A) = x/r = sqrt(11)/4<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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