Consider always showing radius label of "1"

[kathy-phet]

@amanda-phet - I think it might be good to always show the radius label of "1", even when labels is not checked. It's so critical that students know this is a unit circle and so having it always clear that the radius is 1 seems important. The other labels can remain unlabeled, to keep things nice and simple.

Amanda, what do you think?

[amanda-phet]

That's true it's important, but I'm not sure it's fundamental. Regardless of the circle radius, the ratio of the trig function will equal the same value. The radius of 1 is why the x-coordinate (in this example) is exactly the value of cos theta, but you can turn on labels to get to that learning goal.

It also ties the circle to the graph below, which has a max of 1 for this reason, and when labels are turned on you see all of the places where the value is 1.

It's tough because I think all of the labels are super important! I really with theta was always indicated, and might even find that more important.

So, I'm not sure what makes the most sense to do.

[amanda-phet]

Another idea- we could have labels on by default, and people can turn it off to reduce clutter?

[amanda-phet]

@kathy-phet and I discussed this today and would like the 1 on the radius and the theta on the angle to always be visible, if that's a straightforward change.

[jessegreenberg]

I think that is done, @amanda-phet can you please verify?