document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=880749>Question 880749</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How can I express sin195 in terms of a reference angle? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #531657 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=531657\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Work to relate 195 degrees to differences from 90, or 180, or 270 or 360 degrees.  \r<BR>\n" );
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document.write( "195 is a little more than 180 degrees.  <BR>\n" );
document.write( "195-180=15 degree difference, and this is in quadrant 3.  Using how the Unit Circle is symmetric, the sine of 195 is the opposite of the sine of 15 degrees.\r<BR>\n" );
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document.write( "Very likely, you want to relate this to a more familiar reference angle.  <BR>\n" );
document.write( "15 degree is HALF the measure of 30 degree.\r<BR>\n" );
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document.write( "Directly using such a formula,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-sin%2815%29=-sqrt%28%281-cos%2830%29%29%2F2%29 ALIGN=MIDDLE  ALT=\"-sin%2815%29=-sqrt%28%281-cos%2830%29%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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