Recent content by bobraymund

Thanks Bear B for the input. Yeah, I caught myself doing it in DEG, because I was previously using it for my physics homework. That is interesting that you point out I could have used the diagram to find the value of sec^2... I didn't do that, but just did right now and obtained the same...

Really?? Haha, I had no idea what I was doing, honestly. If someone could double check my work, that'd be awesome. I know this is asking a lot. :p

Problem solved :)

Another part of the question is: Suppose that g(x) = 1/[f(x)]2. Is g(x) increasing when x = -1? Explain. It would be decreasing, right? Because the derivative is -1/4. I don't get how to explain that...

Hahaha, oh my gosh I'm stupid. Thank you. :P

Homework Statement A function f with domain [-5, 5] has a derivative f' whose graph is shown http://img718.imageshack.us/img718/2842/calcpic.jpg" . Also, f(-1) = 2. a) If h(x) = ef(x), estimate h'(-1). 2. The attempt at a solution a) h'(x) = f'(x)ef(x) h'(-1) = f'(-1)ef(-1)...

Ah, thanks! that makes sense! So, then this one here: http://img413.imageshack.us/img413/6007/0815002113.jpg Would that be a line with like slope ? Edit: the second question states: describe the locus of points for which theta = 60 and theta = theta1 (where theta1 is a fixed angle)

Hi, So, I was doing my physics summer work and had no idea what the following question was talking about: Homework Statement For the following polar coordinate points: (4, 0) (4, 60) (4, 90) (4, 135) (4, 180) (4, 270) Describe the locus of points for which a) r = 4 b) r = a...

Oh, ha ha. Wow, how embarrassing. It's just epi/2 and e-pi/2. Thanks, heh heh. -bob

Homework Statement Find the vertical and horizontal asymptotes. Homework Equations f(x) = earctan x The Attempt at a Solution Honestly, I am pretty stumped on this problem. I have graphed it on my calculator and messed around a bit, it seems that the horizontal asymptotes are around y =...

Thanks guys! Oh, thanks. I've been using a site called Texify to generate all these pictures! This will save a lot of my time in the future. Thanks again, Bob

Homework Statement Air is being pumped into a spherical weather balloon. At any time t, the volume of the balloon is V(t) and its radius is r(t). Express dV/dt in terms of dr/dt. 2. The attempt at a solution Volume of a Sphere = 4/3 pi r3 I took the derivative of the formula...

Homework Statement Find y'' by implicit differentiation. Homework Equations The Attempt at a Solution I get to this point in the problem, which is I solved for y'. But then when I attempt to take y'', in other words take the derivative of my answer for y', I...

Thank you! I've finally figured it out thanks to the instructions that Dick linked to on that site. Thank you so much for pointing that out. Ha, I am super happy right now you all have no idea. I was trying to figure this out forever, thank you! -Bob

I tried following the instructions on site to plot the points on my TI89 but to no avail. Any further help is kindly welcome. -Bob