Plz help me figure this out

Feb 2014
6
0
ny
I've spent hours trying to figure out how to do these calculus problems and I still have other homework to do for my other classes. I don't need a 4-5 hour lesson, I need the answers now so that i can move on with my other subjects. PLZ HELP!!! (I really don't need unhelpful speeches)

1.use implicit differentiation to find dr/d(theta)

tan (r(theta))=1/2

dr/d(theta)=?


2. If x^3+y^3=7, find the value of d^2y/dx^2 at the point (-1,2).
The value of d^2y/dx^2 at the point (-1,2) is?
This one is really tough

3. Find the lines that are tangent and normal to the curve at the given point.

y=7 sin (pie(x)+7), (-1,0)

The line tangent to the curve y=7 sin (pie(x) + y) at (-1,0) is y=
 

romsek

MHF Helper
Nov 2013
6,836
3,079
California
let me suggest Mathematics Stack Exchange

there may be some folks there that you haven't insulted yet and respond to veiled criticism positively.
 
Feb 2014
6
0
ny
Oh please, if i didn't use "veiled criticism", you would have done exactly what I was complaining about : waste hours of my time. I've been working on this for literally 5 hours. I can't figure it out, so now I need help. If my family was able to pay for a tutor, i wouldn't have to do this. But I'm not amazingly rich, so I'm forced to deal with all this.
 

romsek

MHF Helper
Nov 2013
6,836
3,079
California
<snip> waste hours of my time.
some people, your math professor probably included, refer to this as "learning mathematics". I could go on but you don't want a lecture.