document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=677073>Question 677073</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How can i find the value of sin25 degrees. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #420692 by </B><A HREF=/tutors/aboutme.mpl?userid=jsmallt9><B>jsmallt9(3758)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jsmallt9><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=420692\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This should be pretty easy if you can use a calculator (or calculator program on your computer). Just make sure the calculator is set to work in degrees.<br><BR>\n" );
document.write( "If you are supposed to find an exact value for sin(25), then you must find some expression involving special angles (and possibly factors of 1/2 or 2) that is equal to 25. Then you use sin(A+B), sin(A-B), sin(2x) or sin((1/2)x) to find the value you're looking for. For example:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%2875%29+=+sin%2830%2B45%29+=+sin%2830%29cos%2845%29+%2B+cos%2830%29sin%2845%29+=+%281%2F2%29%28sqrt%282%29%2F2%29+%2B+%28sqrt%283%29%2F2%29%2A%28sqrt%282%29%2F2%29+=+sqrt%282%29%2F4+%2B+sqrt%286%29%2F4+=+%28sqrt%282%29+%2B+sqrt%286%29%29%2F4 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "which is an exact expression for sin(75).<br><BR>\n" );
document.write( "However I am having trouble finding such an expression for sin(25).<BR>\n" );
document.write( "There are plenty of expressions that are equal to 25:<BR>\n" );
document.write( "45 - 20 (but 20 is not a special angle)<BR>\n" );
document.write( "60 - 35 (but 35 is not a special angle)<BR>\n" );
document.write( "(1/2) * 50 (but 50 is not a special angle)<BR>\n" );
document.write( "2 * 12.5 (but 12.5 is not a special angle)<BR>\n" );
document.write( "315 - 290 (but 290 is not a special angle)<BR>\n" );
document.write( "(1/2) * (1/2) * 100 (but 100 is not a special angle)<BR>\n" );
document.write( "etc.<BR>\n" );
document.write( "Perhaps you'll have better luck finding some combination that involves special angles (and possibly factors of 1/2 or 2). </SPAN>\n" );
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