document.write( "Question 919033: Use sin of theta = -8/17
\n" ); document.write( "and theta lies on quadrant III\r
\n" ); document.write( "\n" ); document.write( "find the exact value of a) sin 2 theta b) cos 2 theta c) tan 2 theta\r
\n" ); document.write( "\n" ); document.write( "help explain please so I can have one example to work from \r
\n" ); document.write( "\n" ); document.write( "thank you
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Algebra.Com's Answer #557447 by Alan3354(69443)\"\" \"About 
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Use sin of theta = -8/17
\n" ); document.write( "and theta lies on quadrant III\r
\n" ); document.write( "\n" ); document.write( "find the exact value of a) sin 2 theta
\n" ); document.write( "----
\n" ); document.write( "Find the cos(theta) = sqrt(1 - sin^2)
\n" ); document.write( "cos is negative in Q3
\n" ); document.write( "-
\n" ); document.write( "Then sin(2t) = 2sin(t)cos(t)
\n" ); document.write( "-----
\n" ); document.write( "b) cos 2 theta
\n" ); document.write( "Then cos(2t) = sqrt(1 - sin^2(2t))
\n" ); document.write( "-------------
\n" ); document.write( "c) tan 2 theta
\n" ); document.write( "tan(2t) = sin(2t)/cos(2t)
\n" ); document.write( "==================
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