Week 2 Tutorial 7 : Rotation

Sreenath V

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Oct 21, 2020, 5:48:51 AM10/21/20

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Generally, we rotate anything 360 degrees, it comes back to the same position. But in Week 2 Tutorial 7, when the line segment is rotated 360 degrees, it comes from Quadrant 1 to Quadrant 4. I am not really able to understand this.

Can somebody please explain this?

Brajesh Kedia

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Oct 21, 2020, 6:33:23 AM10/21/20

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Exactly this is my question and more shared some time ago.

subhajit POD

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Oct 21, 2020, 6:45:43 AM10/21/20

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Hi all, This is Subhajit from course support team. If we rotate a line segment, say OP as drawn in the picture we will get back to the line segment itself again.

Here the concept is, if you rotate OP around the X axis you get a cone around the axis of symmetry as X axis. It is actually a three dimensional diagram. The base of the cone will be a circle passing through the point P and its mirror image about the X axis and the centre of the circle will be on the X axis.

Hope you will visualize the figure now. If there are still some doubt please let me know, we will discuss further.
Best

Subhajit

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