<p>Question:</p>
<p>So, for an equation y=sin(x), what is the notation i can write for the x-intercept and y-intercept since there are many of them??</p>
<p>I was looking throught my notes..didnt take them too well today..and now i regret! but, what does a 0+180k for all integers have to do with anything regarding this??</p>
<p>HELP please..its precalc!</p>
<p>There's only one y-intercept; it's at 0.</p>
<p>For the x-intercept, I'd write something like "πn/2, where n is a whole number" (180*n* if you're doing it in degrees.) 'Cause it crosses every π/2, or 180 degrees, right?</p>
<p>Bleh, pi came out ugly on my computer. π = pi.</p>
<p>Edit: Wow I can't read. Yeah, 0+180*k* is the same thing; the 0 is just unnecessary. But say the curve were moved over, say, 30 degrees to the right -- then you'd need 30+180*k*, since all of the intercepts would be shifted. That's probably why the 0's in there.</p>
<p>thanks! so yes, i am doing it in degrees, so the notation 0+180k where k is an integer...would work, right?</p>
<p>Also, although i do NOT need cosine, but would that end up being something like 0+360k??? im still a little confused...:/...math is definitely NOT my thing...as u can tell. Thanks poseur though, i really appreciate your response!</p>
<p>Nope, that one would have an x-intercept of 90+180*k<a href="and%20a%20y-intercept%20of%201.">/i</a> And it's great that you're asking that to make sure you get it. :] </p>
<p>If you look at a picture -- cosine</a> curve -- you'll see that one of the intercepts is at 90 and the rest are spaced out by 180 degrees each. (If the 90 confuses you, keep in mind that 90 is just a "starting point." The curve crosses the x-axis at 90 and at every 180 degrees in either direction. I mean, your answer could also technically be represented as -90+180*k*. Or 270+180*k*. The possibilities are literally infinite; 90 is just the easiest way of denoting it because it's close to 0.)</p>
<p>In the sine curve, however -- sine</a> curve -- it intercepts 0 so you don't have to choose a starting point.</p>
<p>no homework help is allowed here</p>
<p>thats what it says on the sticky</p>
<p>It looks like he/she is just looking to clarify his/her notes, not asking for the answers to homework questions.</p>
