1. Find the domain of definition of f(x)...

1. Find the domain of definition of f(x) = cos(x2 - 4).2. Find the domain of f(x) = 2 cos-22x + sinx.3. Find the domain of f(x) = cos + x + cosx.4. Find the principal value of each of the following:(i) cos-11-13 [NCERT) (ii) cos-1(22)[NCERT)5. For the principal values, evaluate each of the following:

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