Let `f(x)=sqrt(cos x).` Then dom (f ) =?A. `[0.(pi)/(2)]`B. `[(3pi)/(2 – InterviewSolution

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1.	Let `f(x)=sqrt(cos x).` Then dom (f ) =?A. `[0.(pi)/(2)]`B. `[(3pi)/(2),2pi]`C. `[0,(pi)/(2)]uu[(3pi)/(2),2pi]`D. none of these
Answer» Correct Answer - C f(x) is defined only when `rArr ` x lies in 1st or 4th quadrant `rArr ` dom (f) `=[0,(pi)/(2)] uu [(3pi)/(2), 2pi]`

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