document.write( "Question 441384: What is the exact value of cos(-150)? \n" ); document.write( "

Algebra.Com's Answer #304678 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( " cos(-θ) = cosθ
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document.write( " cos(-150°) = cos 150° = 
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document.write( "(cosx,sinx) summary:
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