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  • Adam Eivy 7y

    awesome!
  • Jahedur Rahman 7y

    Wow. that's really nice :)
  • Sai Gudigundla 7y

    that's really funny....
  • Mathew Wilson 5y

    Wonder if anyone got it right without refresh?
  • dude from El Salvador 5y

    What's the answer? hehe
  • porajito 4y

    I got it without any refresh!!! I got a pretty easy one though ;-)
  • scott_herbert 4y

    The answers -3
  • ndej77 4y

    haha, wasn't designed by a mathematician, probably. There is no need for the partial derivative notation because the expression is not multivariate.

    Answer:
    35*cos(5x - pi/2) - 3*sin(3x + pi/2) @ x = 2*pi
    = 35*(0) - 3*(1) = -3
    So -3 is the answer.
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Uploaded on July 16, 2008

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