how I will solve the principal value of Cos inverse cos 5
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Example
Let you = cos-1 (1/2)
Cos y= cos (2/3)
Range of the principal value of cos is (0,n)
Hence, the principal value is 2n/3
Let you = cos-1 (1/2)
Cos y= cos (2/3)
Range of the principal value of cos is (0,n)
Hence, the principal value is 2n/3
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