document.write( "Question 1011053: What is the exact value of cos -150 degrees? \n" ); document.write( "
Algebra.Com's Answer #626579 by stanbon(75887)\"\" \"About 
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What is the exact value of cos -150 degrees?
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\n" ); document.write( "cos(-150) = -cos(30) = -sqrt(3)/2
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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