Surface area of the curve

- Find
*dx/dt*and*dy/dt*: and , respectively - Square them: and , respectively
- Factor out the root's 9 and move coefficients out:
- Note the root contains a square: .
- Thus:

Surface area of the curve

- Find
*dx/dt*and*dy/dt*: and , respectively - Square them: and , respectively
- Factor out the root's 9 and move coefficients out:
- Note the root contains a square: .
- Thus: