**Answer:**

see explanation

**Step-by-step explanation:**

Using identities

sec²x = tan²x + 1

cosec²x = cot²x + 1

cos²x =

(1)

sin²θ +

= sin²θ + cos²θ = 1

(2)

9sec²θ - 9tan²θ

= 9sec²θ - 9(sec²θ - 1)

= 9sec²θ - 9sec²θ + 9

= 9

(3)

- 8cot²A + 8cosec²A

= - 8cot²A + 8(cot²A + 1)

= - 8cot²A + 8cot²A + 8

= 8

(4)

- 10cosec²β + 10cot²β

= - 10(cot²β + 1) + 10cot²β

= - 10cot²β - 10 + 10cot²β

= - 10

**Answer:**

15ft

**Step-by-step explanation:**

if you mean the area that is blank

(Tell me if i'm wrong)

**Answer:**

https://youtu.be/wk9CSsDDppw

The answer would be found by multiplying 9 or the radius sqaured by 3.14 or pi... giving you the answer 28.27 units squared.

**Answer: x=5**

**Step-by-step explanation:**