Answer:
23
Step-by-step explanation:
Given,
tan²A - 5tanA + 1 = 0
tan²A - 5tanA = -1
tanA(tanA - 5) = -1
tanA - 5 = -1/tanA
We know that 1/tanA= cotA
So,
tanA - 5 = -cotA
tanA + cotA= 5
Now, Making square of both sides,
(tanA +cotA)² = 5²
Expanding RHS by (a + b)² = a² + b² +2ab tan²A + cot²A + 2tanA.cotA= 25
tan²A + cot²A + 2tanA ×(1/tanA) = 25
tan²A + cot²A + 2 = 25
tan²A + cot²A = 25-2
tan²A + cot²A = 23
147
180-33=147
4 pages
You divide 36 by 9
The formula of an area of a circle:
r - a radius
We have r = 14m. Substitute:
If you want an approximate area, you can accept
Then:
Answer: answer