Stream function find radial tangential velocity components

[xzi86]

Homework Statement

Given the following stream function:

ψ=C(sin(theta)/r)

Find the radial and tangential velocity components.

Homework Equations

? Don't know any

The Attempt at a Solution

Absolutely no idea how to even begin. Do I take the integral or something? Any help appreciated

 

[rock.freak667]

Find the radial and tangential velocity components.

Homework Equations

? Don't know any

From wikipedia page on http://en.wikipedia.org/wiki/Stream_function" , the two relevant formulas would be


$$v_r = \frac{1}{r}\frac{\partial \psi}{\partial \theta}$$

$$v_{\theta} = - \frac{\partial \psi}{\partial r}$$