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Use the unit circle to find the exact value of the trig function cos(210)

Use the unit circle to find the exact value of the trig function cos(210)
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Use the unit circle to find the exact value of the trig function cos(210)

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User Colin Roe
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1 Answer

3 votes

Answer:

Explanation:

cos(210)=cos(180+30)=-cos 30


=-(√(3) )/(2)

answered
User Sethupathi
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