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**Rotation**90 degrees clockwise: (x,y) --> (y,-x) Think of it like this, clockwise...after you switch x and y, the number on the right is negated. ~**Rotation**90 degrees counterclockwise: (x,y) --> (-y,x) Counterclockwise...2 Answers · Entertainment & Music · 01/05/2013

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**Rotation**90 degrees clockwise: (x,y) --> (y,-x) Think of it like this, clockwise...after you switch x and y, the number on the right is negated. ~**Rotation**90 degrees counterclockwise: (x,y) --> (-y,x) Counterclockwise...1 Answers · Education & Reference · 10/04/2016

...switch back to where you would normally be - i.e. position 4. Look at it this way.

**Rotation**is where the**rules**tell you to go. Switching is where the coach tells you to go...5 Answers · Sports · 13/09/2010

That's a local rule or interpretation. The official wording is, "The ball...

9 Answers · Sports · 30/05/2012

...in a fault. Starting

**Rotation**: The Beginning**rotation**where every player is in their favored/assigned position spot. Overlap rule : Set**rules**that prohibit the player from stepping in front of...2 Answers · Sports · 19/07/2012

... just take turns serving. And, there really isn't a

**rotation**, but you do have to make sure they take turns rotating to serve. ...1 Answers · Sports · 07/08/2010

...replace y with x @ Robert: You are correct for the 180º rotation , but ... Try applying your rules for the other two to the points (1,0) and (0,1)! What you have ...

2 Answers · Science & Mathematics · 09/11/2012

...position at the moment of serve or the referee can whistle you for being out of

**rotation**and the other team will get a point. But you only have to stay there until the...6 Answers · Sports · 10/07/2009

Just curl your fingers around so they match the

**rotation**. Then your right thumb will point parallel to the "north" pole. By convention, that is the direction of the "**rotation**vector".1 Answers · Science & Mathematics · 25/12/2011

...clockwise through an angle θ to get a new point (x', y'), we need to multiply the rotation matrix: [ cosθ -sinθ ] [ sinθ cosθ ], by: [ x ] [ y ]. The product ...

3 Answers · Science & Mathematics · 27/08/2012