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Math Help - spherical coordinates

  1. #1
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    Question spherical coordinates

    Use spherical coordinates to find the centroid of the solid in the first octant bounded by the coordinate planes and the sphere x^2 + y^2 + z^2 = a^2 .

    Can you tell me, in the question, why x bar = y bar = z bar? Thank you very much.
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by kittycat View Post
    Use spherical coordinates to find the centroid of the solid in the first octant bounded by the coordinate planes and the sphere x^2 + y^2 + z^2 = a^2 .

    Can you tell me, in the question, why x bar = y bar = z bar? Thank you very much.
    what are the lines of symmetry in the xy-, yz- and xz-planes? what does this say about x_bar, y_bar and z_bar?
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