<p>wat does sin(a number) mean? i mean it’s always like sin(a degree)…</p>
<p>and wat does e mean? i kind of remember it means unit vector but i believe there’s another explaination to it.</p>
<p>sin is the ratio of two sides of a triangle. it’s primarily used to find the side of a triangle of the angle of a triangle if you have two sides of a triangle.</p>
<p>sin = opposite side of the ANGLE / hypotenuse of TRIANGLE (longest side)</p>
<p>for example if you had a this triangle (yeah, don’t make fun of my triangle)</p>
<p>|\ </p>
<h2>| (\ 5</h2>
<p>4</p>
<p>say i told you the angle between side length 4 and side length of 5 was 60 degrees, and i want you to find the other side, side “x” (the unlabeled vertical side). so based upon our formula SIN = OPPOSITE / HYPOTENUSE</p>
<p>opposite side to angle = x
hypotenuse = 5
angle = 60</p>
<p>sin (angle) = opposite / hypotenuse
sin 60 = x / 5
x = 5sin60</p>
<p>so just stick 5 * sin(60) into your calculator and you have the length of x! which should be 3. =P</p>
<p>look @ <a href=“http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Vectors/MeaningOfSine.html[/url]”>http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Vectors/MeaningOfSine.html</a></p>
<p>AND, e is a number - kinda like phi and pi.
e = 2.71828183
if i remember correctly, it’s used in exponential graphs like log and ln…</p>
<p>ohh, thanks very much for ur help! 
xxx</p>