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    How do u get the 2 statements below "we see that"?
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    The writing above says:

    Consider a rotation of the radius vector through a small angle dtheta
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    (Original post by e^x)
    The writing above says:

    Consider a rotation of the radius vector through a small angle dtheta
    when you differentiate a unit vector which is a function of theta, it rotates by pi/2 anticloclockwise
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    (Original post by TeeEm)
    when you differentiate a unit vector which is a function of theta, it rotates by pi/2 anticloclockwise
    Ah right thanks
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    (Original post by e^x)
    Ah right thanks
    I think I have a sensible proof somewhere if you give me a while
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    (Original post by TeeEm)
    I think I have a sensible proof somewhere if you give me a while
    How can I observe that fact from the diagram?
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    (Original post by e^x)
    How can I observe that fact from the diagram?
    It very difficult from there as your lecturer differentiates the unit vector by "vector differentiation from first principles"
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    (Original post by TeeEm)
    I think I have a sensible proof somewhere if you give me a while
    (Original post by e^x)
    The writing above says:

    Consider a rotation of the radius vector through a small angle dtheta
    Here is my Notes/Proof

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    (Original post by TeeEm)
    Here is my Notes/Proof

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    Thanks a lot
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    (Original post by e^x)
    Thanks a lot
    my pleasure
 
 
 
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