<p>I've taken about 9 math practice tests for the math section of the ACT (McGraw-Hill's 10 Practice ACT Tests and the Real Act Prep Guide) and I've done reasonably well on those, scoring mostly in the 34-36 range.</p>
<p>However, I did the first of the Barron's practice tests today.</p>
<p>15 wrong! What?!</p>
<p>Are the types of questions there similar to the material that will be on the ACT? Will questions about chords, tangents, secants, etc. and how to change bases appear? I hadn't even seen any of that mentioned in any test guide, but I'm now looking at some online materials having specifically searched for chords and tangents + ACT Math, and it seems that a number of resources include such content as part of their review programs.</p>
<p>It isn't disturbing so much that these particular types of questions are on the test (since they can quickly be learned or reviewed) as that many current prep guides don't mention them. Is this just something that Barron's invented on a whim as part of a geometry survey, or have past tests actually focused so much on such old/unused stuff?</p>
<p>I guess I sound unduly hysterical but yes, I do realize that the Barron's book is likely (hopefully) not test-specific or perhaps outdated, and I guess my more general question would be: has anyone who's taken the ACT encountered something that completely took you by surprise that wasn't mentioned in any review guide, or do they in general cover only those topics found in better prep books (the official one in particular)?</p>
<p>(I submitted this already but the submission page was taking a while to load, so I hope this isn't a repost >.<)</p>