What is the value of θ, if x = 2(θ − sen θ)

[dako]

Homework Statement

How may I convert this from parametric to cartesian equation?

Homework Equations

x = 2(θ − sen θ)
y = 2(1 − cos θ)

The Attempt at a Solution

I have a problem finding θ from x = 2(θ − sen θ), I don't know how to do it..

 

[DryRun]

sen θ?

Express the trigonometric part in terms of the variables. Then use trigonometric identity.

 

[I like Serena]

What is sen θ?
Do you mean sin(θ)?

 

[Bohrok]

Seno = sine in Spanish, as well as Italian and Piedmontese according to Wikipedia.

 

[SammyS]

Homework Statement

How may I convert this from parametric to cartesian equation?

Homework Equations

x = 2(θ − sen θ)
y = 2(1 − cos θ)

The Attempt at a Solution

I have a problem finding θ from x = 2(θ − sen θ), I don't know how to do it..

Solve for θ in terms of y, then plug that into the equation for x. It's still not pretty.