Answer each of the following questions in one word or one sentence or as per exact requirement of the question:

Write the value of .


Given cos-1 (cos 14π/3)


= cos-1 [cos (4π + 2π/3)]


= cos-1 (cos 2π/3)


= 2π/3


cos-1 (cos 14π/3) = 2π/3


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