document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=666132>Question 666132</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use trigonometrical identities to expand and simplify if possible, the following:<BR>\n" );
document.write( "1) cos (270 degrees - theta)<BR>\n" );
document.write( "2) sin (270 degrees - theta)<BR>\n" );
document.write( "3) cos (270 degrees + theta) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #414293 by </B><A HREF=/tutors/aboutme.mpl?userid=swincher4391><B>swincher4391(1107)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=swincher4391><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=swincher4391><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=414293\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Remember <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28A%2BB%29+=+sinA+cosB%2B+cosA+sinB ALIGN=MIDDLE  ALT=\"sin%28A%2BB%29+=+sinA+cosB%2B+cosA+sinB\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28A%2BB%29+=+cosA+cosB+-+sinA+sinB ALIGN=MIDDLE  ALT=\"cos%28A%2BB%29+=+cosA+cosB+-+sinA+sinB\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=phi+=+270%5Eo ALIGN=MIDDLE  ALT=\"phi+=+270%5Eo\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28phi-theta%29+=+cos%28phi%29cos%28theta%29+%2B+sin%28phi%29sin%28theta%29+=+cos%28270%5Eo%29cos%28theta%29+%2B+sin%28270%5Eo%29sin%28theta%29+=+0%2Acos%28theta%29+%2B+-1%2Asin%28theta%29+=+highlight%28-sin%28theta%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28phi-theta%29+=+sin%28phi%29cos%28theta%29+-+cos%28phi%29%2Asin%28theta%29+=+sin%28270%5Eo%29cos%28theta%29+-+cos%28270%5Eo%29sin%28theta%29+=+-cos%28theta%29+-+0%2Asin%28theta%29+=+highlight%28-cos%28theta%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "3) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28phi%2Btheta%29+=+cos%28phi%29cos%28theta%29+-+sin%28phi%29sin%28theta%29+=+cos%28270%5Eo%29cos%28theta%29+-+sin%28270%5Eo%29cos%28theta%29+=+0%2Acos%28theta%29+-+%28-1%29%2Asin%28theta%29+=+highlight%28sin%28theta%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );