Answer:
See the proof below.
Step-by-step explanation:
For this case we need to proof the following identity:
So we need to begin with the definition of tan, we know that 
and we have this:
(1)
We also have the following identities:
And if we apply those identities into equation (1) we got:
(2)
We can divide numerator and denominator from expression (2) by 
like this:
And if we simplity we got:
And with that we complete the proof. And that appies for all 
In my opinion I think it's letter d
Answer:
2 & the second part is one unique solution
Step-by-step explanation:
on edge2020
Soryy about this late.
I think the Answer should be :36π yd
Domain is the set of numbers you can use for the equaiton
remember you can't divide by zero, or take the squaer root of a negtive number (we don't have sqrts in this quesiton so don't worry about last one)
so you can't divide by 0
domain =all real number except those that make divide by zero
where is that?
x-1=0
x=1
when x=1, we can't allw that
domain=all real numbers except 1
