Q. 2 C5.0( 3 Votes )

Evaluate each of the following:


Answer :

The value of cos is


Now,


The question becomes cos–1()


Let cos–1 = y


cos y =


= –cos


= cos


cos


The range of principal value of cos–1 is [0,π] and cos


Therefore, the value of cos–1(cos) is.


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