Answer:
c) 380 m²
Step-by-step explanation:
A = π·r²
= 3.14×121
= 379.94
≈ 380 m²
Answer:
k = 10.5
Step-by-step explanation:
8/7 = 12/k
Using cross products
8k = 7*12
8k = 84
Divide each side by 8
8k/8 = 84/8
k = 10.5
The question is related to trigonometry and we have to use the formula of double angle .
Here we use double angle formula of tangent function which is
![tan(2x) = \frac{2tan(x)}{1-tan^2(x)}](https://tex.z-dn.net/?f=%20%20tan%282x%29%20%3D%20%5Cfrac%7B2tan%28x%29%7D%7B1-tan%5E2%28x%29%7D%20%20%20)
Given expression is
![\frac{2tan (5 \degree)}{1-tan^2(5 \degree)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B2tan%20%285%20%5Cdegree%29%7D%7B1-tan%5E2%285%20%5Cdegree%29%7D%20%20%20)
Comparing it with double angle formula, we will get x = 5
SO the required expression is equal to
![\frac{2tan (5 \degree)}{1-tan^2(5 \degree)} =tan(2*5 )](https://tex.z-dn.net/?f=%20%20%5Cfrac%7B2tan%20%285%20%5Cdegree%29%7D%7B1-tan%5E2%285%20%5Cdegree%29%7D%20%20%3Dtan%282%2A5%20%29%20)
![\frac{2tan (5 \degree)}{1-tan^2(5 \degree)} =tan(10 )](https://tex.z-dn.net/?f=%20%5Cfrac%7B2tan%20%285%20%5Cdegree%29%7D%7B1-tan%5E2%285%20%5Cdegree%29%7D%20%20%3Dtan%2810%20%29%20)
So the answer is tan(10) .
Answer: 8
72π=226.19
226.19=π3^2h
226.19=π9h
226.19=28.27h
226.19/28.27=h
8=h
I hope this is good enough:
Answer:
31.6%
6.67%
14.3%
Step-by-step explanation: