document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1078612>Question 1078612</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the exact value of sin 20 if son0= 4/5 andquadrant I 0 is in quadrant 1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #693032 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=693032\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> find the exact value of sin 20 if sin0= 4/5 and 0 is in quadrant 1 <BR>\n" );
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document.write( "Since sin(t) = 4/5 y = 4 and r = 5<BR>\n" );
document.write( "Then x = sqrt[r^2-y^2] = sqrt[25-16] = 3<BR>\n" );
document.write( "So cos(t) = 3/5<BR>\n" );
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document.write( "Ans: sin(2t) = 2*sin(t)*cos(t) = 2(4/5)(3/5) = 24/25<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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