If x = a cosθ and y = b sinθ , find second derivative

I'm guessing the second derivative is for y with respect to x, i.e.

Compute the first derivative. By the chain rule,

We have

and so

Now compute the second derivative. Notice that is a function of ; so denote it by . Then

By the chain rule,

We have

and so the second derivative is

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are

one set of data has more variation than the other. hope this !