Now that's a CAPTCHA!

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    JemmFI, anonymouscoward, and 7 other people added this photo to their favorites.

    1. Jahedur Rahman 68 months ago | reply

      Wow. that's really nice :)

    2. Sai Gudigundla 67 months ago | reply

      that's really funny....

    3. Moff 53 months ago | reply

      Wonder if anyone got it right without refresh?

    4. dude from El Salvador 42 months ago | reply

      What's the answer? hehe

    5. porajito 39 months ago | reply

      I got it without any refresh!!! I got a pretty easy one though ;-)

    6. scott_herbert 34 months ago | reply

      The answers -3

    7. ndej77 32 months ago | reply

      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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