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April 18, 2015

April 18, 2015

Posted by **Elle** on Friday, August 14, 2009 at 3:12pm.

- Math values -
**Marth**, Friday, August 14, 2009 at 4:12pmThe question asks you to find the inverse cosine (arccosine) of -sqrt(3)/2

Think about your memory values and special triangles. Where is cosine(theta) equal to -sqrt(3)/2?

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