Recent content by r6mikey

Need some clarification in regards to trigonometry... Homework Statement For some reason, I am not seeing the cause of this. In attached problem 1, the Forces of x are described with a cos while forces of y are described with sin. In the second problem, the forces of X use sin and the...

I believe so, i just think i got to step away from these books for awhile

so you're saying it would just become (integral)c=x so x(sqrt 5) I'm not seeing the obvious, for some reason i 'm thinking i need substitution...wtf

yea sorry, forgot to put the dx on the outside, but still confused... using substitution and writing the problem like this... u^{1/2} where u=5, du=0dx so dx=du/0 which is ? continuing, if it is right u^{1/2}du would become u^{3/2} times 2/3 so I'm doing something wrong with the...

using the arc length formula the only thing i can think of is that when i get \sqrt{5}dx and dx ends up being 0, it becomes neglible so i only have \sqrt{5} to evaluate from 1 to 3... but then my question would be, I know subtracting 3\sqrt{5} from 1\sqrt{5} gives me the answer 2\sqrt{5} but...

and thinking about it, i should probably not be using the formula for arc length for this problem, even though it is in the arc length chapter...since this is a linear function

[SOLVED] Another simple question that I don't get :( Homework Statement Find the Length of the indicated curve y=2x-3 x[1-3] Homework Equations Arc Length=\int\sqrt{1+[f'(x)]^{2}dx} The Attempt at a Solution ok so y'=2 of course, so it becomes a problem of \int from 1 to...

Homework Statement The base of a soild is the region bounded by y=x^2 and y=x. Find the volume if cross sections perpendicular to the x-axis are squares Homework Equations Integral of A(x)dx The Attempt at a Solution Ok, so I have to take the integral from 0 to 1 after solving...

Something simple that i cannot visualize?? Homework Statement limit as x approaches 0 for sinx/4x Homework Equations ok...what i know is that sinx/x=1 so by that simple statement the answer becomes 1/4 because sinx/x=1 and than there's 4x which gives me the 4...so 1/4...i tend to over...

lim as x approaches 2 for X-2/\sqrt{7+X}-(x+1) this was the problem..I solved it to be -6/5...I just have a question...i have another similar problem, which also becomes in the indeterminate form. lim as t approaches 3 for 1-t+\sqrt{1+t}/t-3 where do i find more information on how to...

Homework Statement The limit as x approaches 2 for (X-2)/(sqrt7+x)-(x+1) Homework Equations The Attempt at a Solution I know i have to rationalize the denominator but it seems like I'm doing something very wrong with my distrubution...please help!