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Math Help - A simple query regarding inequalities

  1. #1
    MHF Contributor alexmahone's Avatar
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    A simple query regarding inequalities

    I know that -1\le \sin x\le 1.

    I also know that it is okay to write -2<\sin x<2.

    But is it okay to write -2\le \sin x\le 2, although the equalities are never attained?
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  2. #2
    MHF Contributor
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    Re: A simple query regarding inequalities

    It is typically bad form to include Domain just for fun, but it sometimes serves a purpose.

    0 \le 1

    It is a matter of validity, not a matter of "okay". Is it valid? Feel free to write it any way you like if it serves some purpose.
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