document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=329512>Question 329512</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm kinda stuck on these three identity Questions: Could you explain how to solve these to me. Please and Thankyou.<BR>\n" );
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document.write( "6. Find the exact value of sin 2 &#952; given that cos &#952; = 12/13 and &#952; is in Quadrant I.<BR>\n" );
document.write( "a. -120/169 <BR>\n" );
document.write( "b. 120/169 <BR>\n" );
document.write( "c. 60/169 <BR>\n" );
document.write( "d. -60/169 <BR>\n" );
document.write( "*sin(2&#952;)=2sin(&#952;)cos(&#952;)<BR>\n" );
document.write( "sin(2&#952;)=2sin(&#952;)cos(12/13)<BR>\n" );
document.write( "sin(2&#952;)=?\r<BR>\n" );
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document.write( "8. Find the value of the tan of a/2 given that cos a = -4/5 and a is in Quadrant II. <BR>\n" );
document.write( "a. 3<BR>\n" );
document.write( "b. 1/2 <BR>\n" );
document.write( "c. -2 <BR>\n" );
document.write( "d. -1/2 <BR>\n" );
document.write( "*tan(a/2)=1-cos(a)/sin(a)<BR>\n" );
document.write( "tan(a/2)=1-cos(-4/5)/sin(1/5)<BR>\n" );
document.write( "tan(a/2)=?\r<BR>\n" );
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document.write( "14. Evaluate sin 165 ° + sin 105 ° . <BR>\n" );
document.write( "*My answer was -&#8730;(2)/2. Am I correct?<BR>\n" );
document.write( "15. Evaluate sin(&#960;/12)-sin((5&#960;)/12).<BR>\n" );
document.write( "*My answer was 1. Am I correct? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236191 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=236191\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 6. Find the exact value of sin 2 &#952; given that cos &#952; = 12/13 and &#952; is in Quadrant I.<BR>\n" );
document.write( "a. -120/169 <BR>\n" );
document.write( "b. 120/169 <BR>\n" );
document.write( "c. 60/169 <BR>\n" );
document.write( "d. -60/169 <BR>\n" );
document.write( "*sin(2&#952;)=2sin(&#952;)cos(&#952;)<BR>\n" );
document.write( "sin(2&#952;)=2sin(&#952;)cos(12/13)<BR>\n" );
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document.write( "sin^2 + cos^2 = 1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sin%28t%29+=+sqrt%281+-+cos%5E2%28t%29%29 ALIGN=MIDDLE  ALT=\"sin%28t%29+=+sqrt%281+-+cos%5E2%28t%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%281+-+%28144%2F169%29%29+=+sqrt%2825%2F169%29+=+5%2F13 ALIGN=MIDDLE  ALT=\"sqrt%281+-+%28144%2F169%29%29+=+sqrt%2825%2F169%29+=+5%2F13\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "sin(2t) = 2sin(t)cos(t)<BR>\n" );
document.write( "= 2(5/13)*(12/13)<BR>\n" );
document.write( "= 120/169<BR>\n" );
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document.write( "8. Find the value of the tan of a/2 given that cos a = -4/5 and a is in Quadrant II. <BR>\n" );
document.write( "a. 3<BR>\n" );
document.write( "b. 1/2 <BR>\n" );
document.write( "c. -2 <BR>\n" );
document.write( "d. -1/2 <BR>\n" );
document.write( "*tan(a/2)=1-cos(a)/sin(a)<BR>\n" );
document.write( "tan(a/2)=1-cos(-4/5)/sin(1/5)<BR>\n" );
document.write( "tan(a/2)=? <BR>\n" );
document.write( "14. Evaluate sin 165° + sin 105°<BR>\n" );
document.write( "*My answer was -&#8730;(2)/2. Am I correct?<BR>\n" );
document.write( "You can use a calculator to see that's not correct.<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "15. Evaluate sin(&#960;/12)-sin((5&#960;)/12).<BR>\n" );
document.write( "*My answer was 1. Am I correct?<BR>\n" );
document.write( "No.  Use a calculator to see that it's -sqrt(2)/2<BR>\n" );
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