geometry - How can I calculate $\alpha=\arccos\left(-\frac{1}{4}\right)$ without using a calculator? - Mathematics Stack Exchange
![How do you calculate\\[\\arccos \\left( { - \\dfrac{{\\sqrt 3 }}{2}} \\right)\\]?](https://www.vedantu.com/question-sets/9f966392-7488-4f46-90f7-a26bf13fc0d22105975331587852969.png "How do you calculate\\[\\arccos \\left( { - \\dfrac{{\\sqrt 3 }}{2}} \\right)\\]?")
How do you calculate\\[\\arccos \\left( { - \\dfrac{{\\sqrt 3 }}{2}} \\right)\\]?
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arccos(1/(sqrt(3)))
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SOLVED: Evaluate arccos a. in radians b. in degrees 2. Evaluate arctan in radians b. in degrees Evaluate arcsin in radians b. in degrees Evaluate arccos in radians b. in degrees
![How to Work with ArcCosine (inverse cosine): ArcCos[-sqrt(3)/2] - YouTube](https://i.ytimg.com/vi/xV-8GcHLGu4/maxresdefault.jpg "How to Work with ArcCosine (inverse cosine): ArcCos[-sqrt(3)/2] - YouTube")
How to Work with ArcCosine (inverse cosine): ArcCos[-sqrt(3)/2] - YouTube
