ACT Trigonometry

Test Preparation ACT Preparation
1

<p>Hi all,
I just started studying for ACT but my trig background is fairly weak.
I have the blue barrons ACT book and under the trig section, there are loads of trig identities that are frankly scaring me.
I do know some of the basic ones (i.g. pythagorean and the sum+difference identities), but the double angle and the half angle ones, I am not familiar with.
I am also good with radians, sohcahtoa and all that other good stuff but can anyone just let me know on how much trig the ACT actually requires?
I know that the barrons books are known to put more than adequate information in their test prep books. </p>

<p>Let me know.
Thanks!</p>

2

<p>This is a good overview of Trig Problems on the ACT</p>

<p><a href=“SparkNotes: Today's Most Popular Study Guides”>SparkNotes: Today's Most Popular Study Guides;

<p>I also use this website,</p>

<p><a href=“http://sbstjohn.com/QODWebSite/act_qod.htm”>http://sbstjohn.com/QODWebSite/act_qod.htm&lt;/a&gt;&lt;/p&gt;

<p>You can pick out the type of question you like</p>

<p>ACT Quantum is also very helpful</p>

<p><a href=“http://www.actquantum.com/releasedacttests/”>http://www.actquantum.com/releasedacttests/&lt;/a&gt;&lt;/p&gt;

3

<p>The trig accounts for 7 % total (4 questions on the Math section). Unless you are already near or beyond a 32/33, you might be better suited to doing other review.</p>

4

<p>thank you so much!</p>

5

<p>If you know sum/difference identities, double angle identities immediately follow. You can also derive half angle identities from previously known identities, but I don’t recall them appearing on the test. You won’t see any more obscure identities like (cos x/2)(cos x/4)(cos x/8)… = (sin x)/x.</p>