<p>Good luck everyone! Post all discussion related to the June 2009 ACT Math Section here.</p>
<p>Finished my ACT 6 hours ago, having taken it in Germany. With the prep I did, very little looked familiar to the questions I’ve seen. Also: all trig and very little geometry - thanks a lot!</p>
<p>Oh well, I guess they make the tests chronologically harder to pinch the re-re-re-re-re-takers, like the ones here.</p>
<p>I’m always glad when they put less geometry-for some reason i’m horrible at it, whereas I always do well on trig for some reason. I’ve never even taken trig…</p>
<p>Anyways, I thought it was easier this time than any other test i’ve taken.</p>
<p>Is the embargo lifted yet?</p>
<p>Post away!</p>
<p>Yeah, there wasn’t very much geometry this time around. And the trig was a lot less complicated. Geometry is my worst Math, so I appreciate it.</p>
<p>wow, that was surprisingly hard. i might have gotten a 35… or god forbid, lower than that. lol.</p>
<p>since the embargo is lifted–there was one about that girl making frames, and maximizing her profit? was that just to make all large frames?</p>
<p>Son said he missed one of the geometry problems. Something about two triangles and you had to find the area of one. He reworked it during the writing test and got the correct answer but did not go back to change it.</p>
<p>i said making all large was biggest profit. and the two triangles with differ angles i thought was 33 maybe?</p>
<p>the areas would be the same; i think the answer was 30, or whatever the original area was. you actually didn’t need a calculator because 110 and 70 are supplementary, hence their sines will be equal. you use that weird formula for the area of the triangle–since both sides and the sines of the angles are equal, then the area is still the same.</p>
<p>I said the same thing as you RPizzle.
For that area of the triangle question… The sides were the same and since the base was bigger because the angle was bigger I said 33 because then that would make the area bigger. I don’t really know if that makes sense, but in my head it did.</p>
<p>oh, and that question at the end with m and n, saying one number must have equaled 3 or something. how did you do that anyways?</p>
<p>i’m not so sure because they both had a side x and a side y that were equal lenghts…the 70 degree angles opposite (unknown side) would smaller proportionally than the 110 degree angles opposite</p>
<p>thats the logic i used.</p>
<p>What was the one about the x^2+mx+n=0
where x had to be -3. I didn’t know how to do that and guessed -3</p>
<p>Then what was the one with the arithmetic sequence?</p>
<p>Ugh. i really didn’t like that math section. for some reason, it seemed harder than the practice ones I took. i ran out of time at the end, probably because of that frame problem, which i didn’t understand properly. 
this is usually my strongest section…but not today. ill prob have to take it again…</p>
<p>but the 2 triangles question, i thought (not 100% sure) that the area of a triangle is equal to .5xysin(theta). So then I solved for xy, and then plugged theta in to find the answer.</p>
<p>the area of a triangle can be alternatively expressed as: 0.5ab * sinC, where C is the included angle between a and b. x and y do represent arbitrary numbers, but the x and y in the first triangle is the same x and y in the next in this problem. sin C is the same value for both 70 and 110. so it’d be 30.</p>
<p>why do u think the sin c is the same value for 70 and 110?</p>
<p>they’re supplementary, which means they can be connected with a horizontal line on the unit circle, which means their sin values will be the same (as sin value is the y coord on the unit circle, which is going to be the same as they’re on a horizontal line).</p>
<p>sin c is different, but ab (or xy) was the same. So you could just plug the angle in for c, and then find an answer. </p>
<p>chair2 has a better explanation then mine.</p>
<p>max profit for the girl selling whatever was to have 9 small and 2 large. all large, she maxed out with something in the 500s. when you do 9,2 (the other endpoint), it’s in the 600s. you had to go back and look at the restraints and test the endpoints</p>