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Female sheabird10



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I understand that domain is what x can be, but i cannot figure this out.

y= the square root of tanx
[Mar 30, 2011 7:07:33 PM] Show Post Printable Version     [Link] Report threaten post: please login first  Go to top 
Female pskinner

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I understand that domain is what x can be, but i cannot figure this out.

y= the square root of tanx


Domain is for values of x so sqrt(x) is real: that is, when x is nonnegative, i.e., x>=0. . In terms of tan(x), values of sqrt(tan(x)) are real when tan(x)>=0. So, 0<=x<pi/2 is ok but -pi/2<x<0 is not in the domain. Since tan(x) is periodic, it is defined on intervals of length pi/2 followed by intervals of the same length where it is not defined.
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