To get to the original point P(3,2), you go right 3 and up 2. To get to the new point (x,y), you
go left 2 and up 3, so its coordinates are (−2,3).
22 . D
Since x is an acute angle, use a right triangle to solve this one.
Since tan , and tangent is opposite over adjacent, you could label the opposite side a
and the adjacent side 2:
Then, by the Pythagorean theorem, the hypotenuse is :
Cosine is adjacent over hypotenuse, so cos x is .