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Thread: new maths questions thread

  1. #1
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    new maths questions thread

    thought i'd start a new maths questions thread
    2sin(2x-pi/6) = 1 for a domain of -pi<x<pi
    we multiply the domain values of 2, so it becomes -2pi<2x<2pi
    but then do we subtract the domain values by -pi/6
    or since 2sin(2x-pi/6) = 2sin(2(x-pi/12)), do we subtract the domain values by -pi/12?
    Thanks
    year 11 2017
    year 12 2018
    year boredsatan 2019
    year LOL 2020-infinity

  2. #2
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    Re: new maths questions thread

    f(x) = sqrt(x+1), and has a restricted domain of [0, infinity)
    g(x) = x^2+4x+3, and has a restricted domain of (-infinity, -3]
    How would i find the range of f(g(x)) without a calculator?
    f(g(x)) = sqrt(x^2+4x+4), so would I use the domain of g(x) as the domain of f(g(x))?
    year 11 2017
    year 12 2018
    year boredsatan 2019
    year LOL 2020-infinity

  3. #3
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    Re: new maths questions thread

    are my questions even showing up in the forum?
    year 11 2017
    year 12 2018
    year boredsatan 2019
    year LOL 2020-infinity

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