Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: - need derivative help

  1. Mar 25, 2010 #1
    urgent -- need derivative help!!

    1. The problem statement, all variables and given/known data

    f(x) = sin^3(x^2 + sinx)

    f(x) = (cosx)^31^2

    f(x) = sin(x^3/(cosx^3))

    2. Relevant equations



    3. The attempt at a solution

    f(x) = sin^3(x^2 + sinx)
    so i said it was 3sin(x^3+sinx) * (2x+cosx)

    f(x) = (cosx)^31^2

    i said this was the same as (cosx)^961, so 961(cosx)^960?

    f(x) = sin(x^3/(cosx^3))
    i said this was the same thing as sin(x^3cosx^-3), so cos(x^3cosx^-3) * (3x^2(cosx^-3) * (x^3(-3sinx^-4)?

    please respond quickly, i have a fast deadline, gah thanks in advance
     
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted