# Plz help me figure this out

#### neeloy

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
let me suggest Mathematics Stack Exchange

there may be some folks there that you haven't insulted yet and respond to veiled criticism positively.

#### neeloy

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
<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.