document.write( "Question 311216: What is the exact value of cos(-240)? \n" ); document.write( "
Algebra.Com's Answer #222565 by nyc_function(2741)\"\" \"About 
You can put this solution on YOUR website!
The answer is -1/2. \r
\n" ); document.write( "\n" ); document.write( "Memorize the unit circle and you'll fly through trigonometry.
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