# Spherical coordinates

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1. Mar 26, 2016

### Dong Hoon Lee

The problem is

<< transform the following vectors to spherical coordinates at the points given

10ax at P (x = -3 , y = 2, z=4)>>

Actually, My first langauge isn't English, please understand that.

x y z can be chage into x = rsinθcosφ , y=rsinθsinφ , z=cosθ

ax vector can be expressed ar,aθ,aφ so, I can change x , y, z

therefore we have to find θ, φ, r

also, we can know the sinθcosφ = x/r sinθsinφ = y/r z=cosθ

10ax = 10ax ar + 10ax aθ + 10ax aφ

= 10sinθcosφ + 10cosθcosφ - 10sinφ

>>>> I can fill out innerproduct between x and r but how to solve the others,

Is it right answer? I want to find more correctly one (it make lots of number, because find each variables through lots of calculation)

>>>> I want to more objective soultion !

2. Mar 26, 2016

### Dong Hoon Lee

I want to know how to chage between sehperical coordinates and cartesian coordinates

3. Mar 26, 2016

### Dong Hoon Lee

I am sorry that I posted wrong forum,,, how can i erase my post?