document.write( "Question 138826: Write \"sin%287x%29cos%285x%29\" as a sum\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Write \"cos%287x%29-sin%285x%29+\" as a product
\n" ); document.write( "

Algebra.Com's Answer #101283 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
1)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Start with the given expression\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Use the Product-to-Sum formula\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Add/Subtract\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Distribute\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "So \r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "2)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Are you sure that it's \"cos%287x%29-sin%285x%29+\"? There are no corresponding sum-to-product identities for mixed the trig functions sine and cosine.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Double check your assignment.
\n" ); document.write( "
\n" );