gideon
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 Apr8 comment what's the difference between a rational number and an irrational number? this is also an excellent, succinct and simple answer. Jan5 comment Learning Mathematics using Khan Academy @Bye_World sadly, I lie in a similar situation as the OP. I've found MIT courseware disheartening. Many times you run into a course, you're excited and you'll then see random bits of content missing. Solutions missing, maybe notes, or assignments etc. Aug28 accepted can't seem to understand $\sin{\theta} = y$ on a unit circle Aug28 comment can't seem to understand $\sin{\theta} = y$ on a unit circle ok! I get it!!! I get it! So when we're talking from the positive axis I always have to count from there. (Or IOW the point P that you mentioned) Aug27 comment can't seem to understand $\sin{\theta} = y$ on a unit circle @Shahar I'm christian but my father in his mad Biblical and Jewish fest named me so, along with taking me to the synagogue nearby every now and then. Aug27 comment can't seem to understand $\sin{\theta} = y$ on a unit circle Yes, but what suddenly makes it $-\sin{\theta}$ now? The diagram has the same theta and the double lines marked on both, leading me to believe that the measure of the angles are the same! Aug27 comment can't seem to understand $\sin{\theta} = y$ on a unit circle oh oh! Is it because the y co-ordinate is really negative not positive. I am however not seeing how this magically makes theta become theta+pi :/ Aug27 comment can't seem to understand $\sin{\theta} = y$ on a unit circle Ok, starting to make some sense. So you're saying the measure at the angle along OB is actually not $\theta$ but $\pi + \theta$ ? But how do I really know when this is the case? Aug27 comment can't seem to understand $\sin{\theta} = y$ on a unit circle @Shahar Yes. Very much an Israeli name, my middle name is also Israel by the way. So both my first and my middle name have never gone down well in india. Aug27 asked can't seem to understand $\sin{\theta} = y$ on a unit circle Aug17 comment Preparing for Spivak What would you recommend for self study? I've tried many times unsucessfullly with Tomas/Finney's - Calculus. I've been using khan academy lately. Jul2 awarded Curious Mar5 awarded Talkative Mar4 comment A family has three children. What is the probability that at least one of them is a boy? I'm asking as a newbie :) @labbhattacharjee your answer suggests P(GGG) is 1/8 (which it is if there are possibilities, which will have to include order like DonAntonios answer) Mar4 comment A family has three children. What is the probability that at least one of them is a boy? @DonAntonio even what you mean is that the order of the births matter right? Mar4 comment A family has three children. What is the probability that at least one of them is a boy? So you are saying the order does matter right? Jun8 awarded Constituent Jun8 awarded Caucus Oct17 awarded Yearling Dec12 awarded Quorum