document.write( "Question 984816: Perform the indicated operation, and enter your answer in standard form:\r
\n" ); document.write( "\n" ); document.write( "5*(cos(150°)+isin(150°))*4*(cos(30°)+isin(30°))\r
\n" ); document.write( "\n" ); document.write( "Thanks \n" ); document.write( "
Algebra.Com's Answer #605637 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Multiply the 5 by the 4 getting 20\r\n" );
document.write( "Add the 150° and the 30° getting 180°\r\n" );
document.write( "\r\n" );
document.write( "\"20%2A%28cos%28%22180%B0%22%29%2Bi%5E%22%22sin%28%22180%B0%22%29%29\"\r\n" );
document.write( "\r\n" );
document.write( "Then substitute cos(180°) = -1 and sin(180°) = 0, the above becomes\r\n" );
document.write( "\r\n" );
document.write( "\"20%2A%28-1%2B0i%29\"\r\n" );
document.write( "\r\n" );
document.write( "-20.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );