<p>The problem was (cos x + sin x)^2 = k</p>
<p>I tried factoring it (i left the problem blank), and I got sin^2 x + 2sin x(cos x) + cos^2 x = k, which is 2sinxcosx +1 = k, which is sinxcosx=(k-1)/2, and I didn't know where to go from there.</p>
<p>when you factor, you are actually left with 1 + 2sinxcosx = k, which is the same as Sin(2a) + 1 = k
you have sin(2a) = k - 1, now you can set arcsin(k-1) = 2a, and solve for a
i got a = arcsink(k-1) / 2</p>
<p>Post Your Questions / Answers</p>
<p>sickofflorida are you serious? raw score of 45/50 and you can still get an 800? is that scale still accurate today?</p>
<p>btw, what did you guys get on the one that was like: you have integers 1, 1, 1, 4, 4, 6, 8, 8, n and mode < mean < median, or something like that.</p>
<p>I know it was really easy but I skipped it on my first pass thru just b/c I didn't want to bother, was looking for the easiest ones, and then when I came back to it the proctor called time, so I marked A without really thinking.</p>
<p>i believe it was 5</p>
<p>i put 5 too</p>
<p>i've taken practice tests where a raw score of 43 gets you an 800, i'm really hoping that's the truth because on other tests a 45 is the last 800. i left out 2 so i guess i can get about 2 more wrong</p>
<p>yeah it was 5. i thought the test was pretty easy. the first time i took math level 2 i got a 700 and totally ran out of time. this time i worked FAST and was done with like 10 minutes left to check my answers. i am having trouble remembering specific questions right now so if anyone can post some, that'd be great</p>
<p>"yeah it was 5"</p>
<p>ahh man. i can't believe i was stupid enough to mark it without thinking. oh well.</p>
<p>i think the curve will be a <em>little</em> harsher than usual on this exam because it wasnt extremely difficult. i mean the vector question was a little tricky, but doable. hopefully i got an 800. okay.....anyone else remember questions?</p>
<p>Does anybody remember the question about finding the minimum of something if so what was the answer?</p>
<p>I remember the question, not the answer...but all you had to do was graph and find the minimum...was it 10? Does that sound right?</p>
<p>yeah that sounds about right .... i just took the derivative and set the equation to zero</p>
<p>the last one was definitely arcsin(k-1) all over 2</p>
<p>(cosx + sinx)2 = k </p>
<p>cosx2 +2sinxcosx +sinx2 = k</p>
<p>1 + sin2x = k </p>
<p>2x = arcsin(k-1) </p>
<p>i skipped a couple , did anyone get the empty set for 2?</p>
<p>I found myself using the calculator a lot for the test, especially with the graphs. The thing is, it's not hard to get a 700, but at the same time colleges know that they scale the test pretty high.</p>
<p>yeah i got empty set</p>
<p>excuse me for writing what someone else already said. i think the minimum was 1 or something...i don't remember clearly, i graphed it and that's what it came out to.,</p>
<p>i screwd up on an easy one....</p>
<p>the triangle with sides 15 and 12 and the middle angle 25.</p>
<p>the answer is 38, there is probably a formula but i used law of cosines and then heron's. unfortunately this was the five minutes after the proctor said pencil's down so i got it wrong.</p>
<p>I omited the one before last, i don't remember what it asked, but i do remember not knowing what it meant.</p>
<p>The last one was definitely arcsine(k-1)/2</p>
<p>5 is right</p>
<p>10 is the minimum you do -b/2a ...2x^2 - 40x + 400 = 0</p>
<p>2/pi^2 was the period of sin(1/pi) (I may be off on some of these, my memory of them is fading)</p>
<p>0.63 was one of the percent problems, i don't remember the question well, something about discount prices. i multiplied 0.8 * .75 and then by 1.05</p>
<p>112 might have been one of the answers? i remember doing four squared times nine divided by 3 plus 64</p>
<p>For the plane question i too put point and line</p>
<p>i remember choosing 9,000,000 for one of them and multiplying 9 times 10 to the sixth...a probability question.</p>
<p>I was disappointed that there were no limits and only one summation, those are quick ones.</p>
<p>The recursive summation one i can't remember but I know it was there. -6, -13, -24 were the numbers and the answer was 2*previous + 1? or something like that</p>
<p>And how about the 2nd to last problem? The "if ab is divisible by c" then "b is divis..."</p>
<p>I basically guessed on that one in the last 2 seconds of the text, I believe I chose D. I don't remember why... anyone remember the correct answer to that?</p>
<p>does anyone think the curve will be 43-800?</p>
<p>I guess the order is different, that wasn't my second to last problem, but i worked that out with numbers and I got it, can't remember the answer...</p>