document.write( "Question 174477: 24. find the exact values for sin2u cos2u tan2u
\n" ); document.write( " cosu=-2/3 \n" ); document.write( "

Algebra.Com's Answer #129487 by rapaljer(4671) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"sin2u%2A+cos2u%2A+tan2u\"$
\n" ); document.write( " $\"sin2u%2A+cos2u%2A+%28%28sin2u%29%2F%28cos2u%29%29\"$
\n" ); document.write( " $\"%28sin+2u%29%5E2+\"$
\n" ); document.write( " $\"%282sinu%2Acosu%29%5E2+\"$
\n" ); document.write( " $\"4+%28sin+u%29%5E2+%2A+%28cos+u%29%5E2\"$ , where $\"%28cos+u%29%5E2=4%2F9\"$ and $\"%28sin+u%29%5E2+=+1-%28cos+u%29%5E2+=+5%2F9+\"$
\n" ); document.write( " \r
\n" ); document.write( "\n" ); document.write( "Now, $\"4+%28sin+u%29%5E2+%2A+%28cos+u%29%5E2\"$ ,
\n" ); document.write( " $\"4%2A%285%2F9%29%2A%284%2F9%29+\"$
\n" ); document.write( " $\"80%2F81\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "R^2 \n" ); document.write( "

\n" );