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Math Help - continuity of trigonometric

  1. #1
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    continuity of trigonometric

    determine where f is continuous.

    a) f(x)=sin^-1(2*x)
    b) f(x)=exp(sinx/x)
    c) f(x)=(sin^-1(1/x))/(x)
    d) f(x)=ln|x|-2*ln(x+3)
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  2. #2
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    all these functions are continuous in the intervals where they are defined. i will give u the following hints:
    1)-pi/2<=sin^-1(x)<=pi/2
    2)2<e<3
    3)same as 1
    4)for ln(x) x>0

    however i am myself confused about the second one. please help on this!
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  3. #3
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    there have been mistakes. please delete my post.
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