SAT Subject Test Mathematics Level 2

(Marvins-Underground-K-12) #1
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  .
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