document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1092648>Question 1092648</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, I need help concerning these problems. I don't know which ones to circle. I would appreciate any help you can give me. Thanks in advance! \r<BR>\n" );
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document.write( "1. Circle all expressions that are equivalent to sin4a.\r<BR>\n" );
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document.write( "A. 4 sin a cos a\r<BR>\n" );
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document.write( "B. 4 sin a cos a - 8 sin^3 a cos a\r<BR>\n" );
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document.write( "C. sin a cos 3a - cos a sin 3a\r<BR>\n" );
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document.write( "D. 2 sin 2a cos 2a\r<BR>\n" );
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document.write( "E. 4 sin a cos a cos 2a\r<BR>\n" );
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document.write( "F. 4 sin a cos^3 a - 4 sin^3 a cos a\r<BR>\n" );
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document.write( "2. Circle the expression that is equivalent to tan 3pi/8.\r<BR>\n" );
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document.write( "A. Square root of 2 +1\r<BR>\n" );
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document.write( "B. Square root of 2 -1\r<BR>\n" );
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document.write( "C. 1 - square root of 2\r<BR>\n" );
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document.write( "D. None of these. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #707280 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=707280\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> https://www.algebra.com/algebra/homework/Pythagorean-theorem/Pythagorean-theorem.faq.question.39250.html </SPAN>\n" );
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