document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1015673>Question 1015673</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have two questions :).<BR>\n" );
document.write( "1. Use a calculator to find the approximate value of cos^-1(0.78).<BR>\n" );
document.write( "2. Find the exact value of tan (arcsin (two fifths)). Please explain your reasoning.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #632028 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=632028\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In your calculator, press .78.<BR>\n" );
document.write( "Hit arc cos button.<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28theta%29=2%2F5 ALIGN=MIDDLE  ALT=\"sin%28theta%29=2%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So then,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%5E2%28theta%29%2Bcos%5E2%28theta%29=1 ALIGN=MIDDLE  ALT=\"sin%5E2%28theta%29%2Bcos%5E2%28theta%29=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%2F5%29%5E2%2Bcos%5E2%28theta%29=1 ALIGN=MIDDLE  ALT=\"%282%2F5%29%5E2%2Bcos%5E2%28theta%29=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F25%2Bcos%5E2%28theta%29=1 ALIGN=MIDDLE  ALT=\"4%2F25%2Bcos%5E2%28theta%29=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%5E2%28theta%29=21%2F25 ALIGN=MIDDLE  ALT=\"cos%5E2%28theta%29=21%2F25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cos%28theta%29=0+%2B-+sqrt%2821%29%2F5 ALIGN=MIDDLE  ALT=\"cos%28theta%29=0+%2B-+sqrt%2821%29%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So then,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28theta%29=%282%2F5%29%2F%280+%2B-+sqrt%2821%29%2F5%29 ALIGN=MIDDLE  ALT=\"tan%28theta%29=%282%2F5%29%2F%280+%2B-+sqrt%2821%29%2F5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28theta%29=0+%2B-+2%2Fsqrt%2821%29 ALIGN=MIDDLE  ALT=\"tan%28theta%29=0+%2B-+2%2Fsqrt%2821%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%28theta%29=0+%2B-+%282%2F21%29sqrt%2821%29 ALIGN=MIDDLE  ALT=\"tan%28theta%29=0+%2B-+%282%2F21%29sqrt%2821%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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