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Math Help - Slope of a tangent.

  1. #1
    Junior Member
    Joined
    Nov 2009
    Posts
    25

    Slope of a tangent.

    Hey, I would like you guys to check over my answer as it seems a little bit odd to me.

    The question is to find the equation of a tangent. So far, I've got the derivative.

    y' = xy/2 + pi(cos(y))

    So to get the slope, I've substituted x and y with a point (1, pi/2)

    I've managed to get:

    pi/4+2pi

    Is that correct?
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  2. #2
    Member
    Joined
    May 2009
    Posts
    211
    cos(pi/2) = 0

    so answer is pi/4
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