Functions - General Equation of a Circle

[865river]

2 confusing

[ABCba5tard]

this is kinda required in geo cuz there is a section about it

[Shaffer88falconfan]

thanks for the help i appreciate it

[mlfking]

fuck math

[ABCba5tard]

@mlfking fck you

[daddygreenjeens]

lesson begins at 4:35 or so onward....

[scout6686]

talk slower charlie

[sunny4u2k1]

Guys, follow his explanations... but not his diagrams... some of his diagrams are very wrong for example the one he draws for (x-a)^2 + (y-b)^2 = r^2

I feel correct diagram would have made it more easy for people to understand it quickly with less confusions... and would also help other to visualize what that equation is trying to say.

[helenJuice]

wow you a good!!

[lanhoilah]

very helpful, you're the man

[marcusjhung]

Great presentation! I love your candid method of explaining complex formulas in everyday terms. My understanding of relationships between increasing powers in parabolas and the circle formula has been reinforced greatly. Please keep up the great work!

[jamez515]

i love you donylee. . .keep up the good work

[DicleDaRiver]

I loved math all my life, now I love Donylee, thanks for the video, holla lol

[s0phistic4ti0n]

The sound was a bit poor, but I managed to pick up a fair amount. Will this be useful for GCSE?

[canadaonly2]

you're a nice guy

[VoodooJulz]

Can you upload ellipse and hyperbola?

[widdalightsout]

Thanks alot you have been really helpful.

Thanks again.

[Wuzzi55]

math for retards. Whoever does not understand this, is not count as a smart human, and I feel sorry for myself wasting my time, writing this comment, but truth must be said...:D

[Shaask]

You're an absolute idiot.

[savagebaboon]

Wuzzi55, for such a 'smart guy' your grammar is very poor. Have you considered the fact that you may not be as smart as you profess to be?

Cock!!

Thanks for the lesson Donylee.

[ink942]

thanks and good job

[goodbyspam]

Thanks - I wonder if it would be helpful (maybe not) to say that when x^2 + y^2 =1 this is because when dealing with a radius of 1 we are really seeing 1^2 just like a^2 + b^2 = c^2. SO that hypotenuse is the distance from the center to the edge of the circle. That's how I try to use it.

[donylee]

Yup goodbyspam. Perfectly correct. Yes, in fact if the radius is r, the equation of the circle does take the form:

x^2+y^2=r^2.

I didn't really think of your method of using hypotenuses to visualizing circles. It is neat indeed.

[daganboy]

x(t)=sin(t)

y(t)=cos(t)

graph

[donylee]

Not a problem yani. Could check out my website for more calculus related topics. Small ERRATA: On the diagram, I should have labelled r, x, and y and NOT r^2, x^2, y^2. My apologies.

[yani12345]

thanks for posting this, i was having some trouble with this in school and you cleared some of it up for me.