Bazza's 3/4 Question Thread

[pi]

1) On a Cartesian plane (and that is the important part), I think the domain would be [-1, 1]. Isn't it just a reflection in y=x, ie. inverse (albeit not a one-to-one function so not a proper inverse)?

2) As per other thread. I wouldn't do it. But if you had already define x=... it should be ok. Play it safe.

[brightsky]

1) x=cosy is the inverse relation of y=cosx. so it has domain [-1,1] and range R. domain is always the 'range' of independent values.

2) don't see any problem with that. although i'd err on the side of caution and just write everything in terms of y, i.e. write x(y).