document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1145659>Question 1145659</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If cos β = - 3/5 then, without a calculator, find cos(𝛑/2 - β). Write your answer as a fraction please.<BR>\n" );
document.write( "Thank You </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #766881 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=766881\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If cos β = - 3/5 then, without a calculator, find cos(𝛑/2 - β). <BR>\n" );
document.write( "------------<BR>\n" );
document.write( "cos(𝛑/2 - β) = sin(β)<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=If+cos+%CE%B2+=+-+3%2F5+then%2C+without+a+calculator%2C+find+cos%28%F0%9D%9B%91%2F2+-+%CE%B2%29.+%0D%0A------------%0D%0Acos%28%F0%9D%9B%91%2F2+-+%CE%B2%29+=+sin%28%CE%B2%29%0D%0A-------%0D%0A ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >sin(B) = sqrt(1 - cos^2(B)) = 4/5 or -4/5<BR>\n" );
document.write( "======<BR>\n" );
document.write( "Cos is negative in Q2 and Q3.<BR>\n" );
document.write( "Sin is positive in Q2 and negative in Q3 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );