document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=282047>Question 282047</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In triangle ABC, angle C is a right angle. If sin A = 6/10, find cos A.<BR>\n" );
document.write( "a. 3/5<BR>\n" );
document.write( "b. 3/4<BR>\n" );
document.write( "c. 8/10<BR>\n" );
document.write( "d. 10/8 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #204841 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=204841\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Garamond\" size=\"+2\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \cos^2\phi\ +\ sin^2\phi\ =\ 1\">\r<BR>\n" );
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document.write( "so:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \cos\phi\ =\ \sqrt{1\ -\ sin^2\phi}\">\r<BR>\n" );
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document.write( "so:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \cos{A}\ =\ \sqrt{1\ -\ \left(\frac{3}{5}\right)^2}\ =\ \sqrt{\frac{16}{25}}\ =\ \frac{4}{5}\ =\ \frac{8}{10}\">\r<BR>\n" );
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document.write( "Or you could just recognize that is is just a 3:4:5 right triangle, so the sides are 6 and 8 and the hypotenuse is 10, so <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\Large \cos{A}\"> has to be <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\Large \frac{8}{10}\ =\ \frac{4}{5}\">\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
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