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Compute \(\arccos (\cos 7).\) All functions are in radians.

 Sep 11, 2019
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arcos and cos cancel each other out and you are left with 7 R

7 Radians is equal to   7 - 2pi = .7168 R     ( As this is reference angle   -.7168  would give the same result)

 Sep 11, 2019
edited by ElectricPavlov  Sep 11, 2019

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