document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=853151>Question 853151</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let f(x)=sin x, g(x)=cos x, and h(x)=2x. Find the exact value of each expression. Do not use a calculator.\r<BR>\n" );
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document.write( "(A) g(5pi/6+pi/6)=g(5pi/6)+g(pi/6)\r<BR>\n" );
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document.write( "(B) (h^(degree)f)(11pi/4)\r<BR>\n" );
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document.write( "Please I need help with this!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #513918 by </B><A HREF=/tutors/aboutme.mpl?userid=harpazo><B>harpazo(655)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=harpazo><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=harpazo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=513918\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "I will solve A.\r<BR>\n" );
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document.write( "Replace x in g(x) with the given trig values and then use the unit circle diagram to find the exact values. Remember that on the unit circle, the point is (cosine, sine). \r<BR>\n" );
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document.write( "g(5pi/6+pi/6) = g(5pi/6)+g(pi/6) \r<BR>\n" );
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document.write( "cos(5pi/6) + cos(pi/6)\r<BR>\n" );
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document.write( "cos(5pi/6) = -sqrt(3)/2\r<BR>\n" );
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document.write( "cos(pi/6) = sqrt(3)/2\r<BR>\n" );
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document.write( "This means that when added, \r<BR>\n" );
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document.write( "cos(5pi/6) + cos(pi/6 = \r<BR>\n" );
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document.write( "-sqrt(3)/2 + sqrt(3)/2 = 0\r<BR>\n" );
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document.write( "The answer for A is zero.<BR>\n" );
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