<p>Can someone explain the triangle question that asked what was the length of the chord AB? it said A and B were two points on the circle and there were two angles each marked theta in two right triangles?</p>
<p>blahhhhhhh</p>
<p>General Rak (or anyone)</p>
<p>Why was the rate for the NYC increase problem .003? i could have sworn it was .03 (3%)?</p>
<p>“Why was the rate for the NYC increase problem .003? i could have sworn it was .03 (3%)?”</p>
<p>I thought it was 3% as well, but apparently it turns out that the increase was 0.3%.</p>
<p>its said .3 percent</p>
<p>triangle chord question:
it was a unit circle, so r=1
the chord was made up of the bases of two right triangles
use trig, each base = sin(theta) since its a unit circle
multiply by two to get 2sin(theta) for the chord length</p>
<p>Was the prime number question where there are four prime number’s product and how many factors can the product have?</p>
<p>^yes, and that 3 of the 4 were same prime numbers.</p>
<p>This might be a stupid question, but for the law of cosines, what were the info you needed?</p>
<p>all the sides</p>
<p>Was this Math IIc test harder or easier than Barron’s, PR, Kaplan?</p>
<p>I must have misread the prime number question, I thought it was 4 distinct numbers, so I put 16. 
stupid me</p>
<p>For the unit circle question.</p>
<p>I refer to this diagram: <a href=“http://powerpolitics.org/unitcirc.jpg[/url]”>http://powerpolitics.org/unitcirc.jpg</a></p>
![http://powerpolitics.org/unitcirc.jpg[/url]](http://powerpolitics.org/unitcirc.jpg%5B/url%5D){kind=link}
<p>Since R is the center of the circle, we know that each of the two lines connecting R to the circle are radii. Since this is the unit circle, the radii are each equal to 1.</p>
<p>Sin (x) = opposite / hypotenuse</p>
<p>So</p>
<p>Sin (x) = B / 1 = B
and
Sin (other side) = A / 1 = A</p>
<p>Since the angles are equal the sins are equal. So 2*sin(x) = 2B = A + B, which is what you’re trying to find.</p>
<p>for the two points p and q question:</p>
<p>i think i had (2,-4) as the answer. i think the point given was (-1,2)? not sure. anyways, the distance is rt(5). when you double it, it’s 2root(5). square that= 20. and opposite direction would be (2,-4)</p>
<p>gxing, I put (2,-4) as well, there were only two choices that were twice the distance and this was the only one that was the opposite direction.</p>
<p>u know, it would be really nice if someone compiled a list of all the answers like on the sat ii us history thread :-)</p>
<p>for the nyc question if it was .3% then wouldnt you just add 1 to that and take it to the 25 power??</p>
<p>can someone compile all the confirmed answers?</p>
<p>you would add 1 to .003, because you re-write .3%. </p>
<p>so it would be (Initial amount)(1.003)^25</p>
<p>You’d do: original population * (1 + .3%)^25</p>
<p>so what was the answer?</p>