# Thread: one graph, one related rates problem

1. ## one graph, one related rates problem

i need solution

Now, what have you done with these two problems?

2. ## Re: one graph, one related rates problem

Hey yns177.

We'll start with the first one: can you show us an attempt of graphing the function?

4. ## Re: one graph, one related rates problem

The rate of change of the angle, $\frac{d\theta}{dt}$, needs to be expressed in radians/minute:

$\frac{d\theta}{dt}=\frac{0.27\pi}{180}=0.00471$

So $\frac{dx}{dt}=-80\csc^2{\theta}\frac{d\theta}{dt}=-80\left(\frac{100}{80}\right)^2(0.00471)=0.589$ feet per minute

- Hollywood

5. ## Re: one graph, one related rates problem

Who was it who originally posted the question?

6. ## Re: one graph, one related rates problem

Originally Posted by HallsofIvy
Who was it who originally posted the question?
The OP, yns177, piggybacked onto another thread. I moved it.