document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=207434>Question 207434</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the exact value of cos 105degrees. without the table or calculator. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #156855 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=156855\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> find the exact value of cos 105degrees. without the table or calculator.<BR>\n" );
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document.write( "cos(105) = cos(45+60) = cos(45)cos(60)-sin(45)sin(60)= <BR>\n" );
document.write( "= (sqrt(2)/2)(1/2)-(sqrt(2)/2)(sqrt(3)/2)<BR>\n" );
document.write( "= (sqrt(2)/4 - (sqrt(6)/4)<BR>\n" );
document.write( "= [sqrt(2)-sqrt(6)]/4<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );