document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1103427>Question 1103427</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Evaluate the expression.\r<BR>\n" );
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document.write( "sin(90-theta)*tan(theta)*sec(theta)\r<BR>\n" );
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document.write( "a)sin(theta)<BR>\n" );
document.write( "b)cos(theta)<BR>\n" );
document.write( "c)tan(theta)<BR>\n" );
document.write( "d)cot(theta)\r<BR>\n" );
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document.write( "(Homeschooling mother. Any help is appreciated. 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 #718161 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=718161\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%2890-x%29+=+cos%28x%29 ALIGN=MIDDLE  ALT=\"sin%2890-x%29+=+cos%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "You can see this if you think of a right triangle.  In a right triangle, the acute angles are x and 90-x; by the basic definition of the functions in a right triangle, the sine of one acute angle is the cosine of the other, and vice versa.  So sin(90-x) = cos(x) and cos(90-x) = sinx.<br><BR>\n" );
document.write( "Then, by definition, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28x%29+=+sin%28x%29%2Fcos%28x%29 ALIGN=MIDDLE  ALT=\"tan%28x%29+=+sin%28x%29%2Fcos%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sec%28x%29+=+1%2Fcos%28x%29 ALIGN=MIDDLE  ALT=\"sec%28x%29+=+1%2Fcos%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "So<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28sin%2890-x%29%29%2A%28tan%28x%29%29%2A%28sec%28x%29%29+=+%28cos%28x%29%29%2A%28%28sin%28x%29%2Fcosx%29%29%2A%281%2Fcos%28x%29%29+=+sin%28x%29%2Fcos%28x%29+=+tan%28x%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Answer c. </SPAN>\n" );
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