Recent content by dannyxyeah

I've mostly lost motivation in this problem. I don't understand the meaning of what I'm doing. :(

ignore this please. I got it :)

Great, thank you! Also, how do you interpret the "find the (x,y) coordinates of the corresponding points"? What do you reckon it's asking for? Just to plug in the different t values into each x and y equation initially given?

Would it mean that the bird was either stationary or floating in place? Ah, that means I need to include every interval of pi/2 up until 8pi/2 correct?

a=(-c/d), but I've had that since the original post, no?

I don't really follow this last part; how do I know which point on the circle (or likewise, on the parabola) I am supposed to choose?

The flight of a bird follows the curve x=t-cos(t), y=3-2sin(t)... where 0<=t<=4pi is the time in seconds. a) What times is the bird flying horizontally? find the (x,y) coordinates of the corresponding points. b) What times is the bird flying vertically? find the (x,y) coordinates of the...

y'=x m=a y-y1=m(x-x1) y-b=(a)(x-a) y'=-x/y m=-a/b y-y1=m(x-x1) y-b=(-a/b)(x-a) Is this what you mean?

That's exactly why I'm having trouble working out how to make sure that the tangent line passes through (a,b) and (c,d) :/

Yes, my mistake! Right, that makes sense. Thanks! How do you reckon I should proceed from here? My mind is a total blank.

There are two railroads, represented by the curves y=(1/2)x2+7, and x2+y2=1. I am supposed to find a straight line connection so that a atrain can get from one curve to the other. I have drawn a simple diagram to help me picture things: http://i50.tinypic.com/2saeccx.png where (a,b) and (c,d)...