SAT Subject Test Mathematics Level 2

LEVEL 2 IDENTITIES

Besides questions that ask explicitly about such identities, there are other questions that become a
lot easier and faster to answer when you know the right identities. That’s the case with Example 3.

Example 3

Here’s one way to answer this question. First find A :

Then plug A = 34.19 into the expression you want to evaluate:

1. If   cos     what    is  the value   of  

(A) 0.18

(B) 0.37

(C) 0.74

(D) 1.36

(E) 2.71