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Math Help - derivative stuff and graphing

  1. #1
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    derivative stuff and graphing

    given: y= sin2x - 2sinx

    find first and second derivative and then stuff like mins and maxes and concave up, concave down, range domain. this is hard for this trig function..
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  2. #2
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    show what you have done, and especify the parts in which you need help.
    You learn more by trying than by getting the right answer.
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  3. #3
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    Quote Originally Posted by Arturo_026 View Post
    show what you have done, and especify the parts in which you need help.
    You learn more by trying than by getting the right answer.
    well i got the zeros in the first period to be zero and pi, but that was only through my calc. like i dont actually know how to write out that work. and for the first derivative i have 2cos2x-2xosx=0 and for second derivative i have -4sin2x+2sinx.
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  4. #4
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    also how do i know if it has symmetry and the domain and stufff ughh
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