EXERCISE 4.2 LEVEL-1 1. Find the domain ...

EXERCISE 4.2 LEVEL-1 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+cos X. 4. Find the principal value of each of the following: (1) cos-11-13) (NCERT) [NCERT) (ii) cos(3) (iv) cos-1 (tan) 5. For the principal values, evaluate each of the following:

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