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C3 Differentation: Where did I go wrong in this question...? Watch

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    (Original post by creativebuzz)
    I've attached my working out as well as the question
    Your attachment hasn't worked.
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    (Original post by aoxa)
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    (Original post by creativebuzz)
    Fixed

    At the end, you don't need to square root the x and y co-ordinates, as the distance you are finding is just the distance from the origin to another point on the y axis, so your distance will just be the y co-ordinate, pi/2 -1.

    I can't see where the other mistake is, with ending up with a -pi/2 -1 instead of a +pi/2 -1. :dontknow:
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    (Original post by aoxa)
    At the end, you don't need to square root the x and y co-ordinates, as the distance you are finding is just the distance from the origin to another point on the y axis, so your distance will just be the y co-ordinate, pi/2 -1.

    I can't see where the other mistake is, with ending up with a -pi/2 -1 instead of a +pi/2 -1. :dontknow:
    Ah I see, thank you!

    Is it alright if you can see where I'm going wrong here?
    I've got the form of the equation correct but I don't know how to find "the greatest value of eachfunction and the smallest positive value of x"


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    (Original post by creativebuzz)
    Ah I see, thank you!

    Is it alright if you can see where I'm going wrong here?
    I've got the form of the equation correct but I don't know how to find "the greatest value of eachfunction and the smallest positive value of x"


    I'm sorry but we don't do that for our spec so I have no idea what you're doing! I would suggest differentiating it and put solving dy/dx=0 for the greatest value of the function because I recall doing something similar in step class but I don't know if that would help at all!
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    (Original post by aoxa)
    I'm sorry but we don't do that for our spec so I have no idea what you're doing! I would suggest differentiating it and put solving dy/dx=0 for the greatest value of the function because I recall doing something similar in step class but I don't know if that would help at all!
    Oh no that's okay! Positive rating given anyway
 
 
 
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