# Point A is at #(3 ,9 )# and point B is at #(-2 ,5 )#. Point A is rotated #pi/2 # clockwise about the origin. What are the new coordinates of point A and by how much has the distance between points A and B changed?

##### 1 Answer

May 29, 2017

The new coordinates of

#### Explanation:

The matrix of a rotation clockwise by

Therefore, the trasformation of point

Distance

Distance

The distance has changed by