Answer:
The the angle which the wire make with the ground is 1.280 radian .
Step-by-step explanation:
Given as :
The length of the wire attached to the top of building = OB = 70 foot
The distance of wire anchored from base of ground = OA = 20 feet
Let the angle made by wire en and ground = Ф
Now from , In Triangle AOB
Cos angle = ![\dfrac{\textrm Base}{\textrm Hypotenuse}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctextrm%20Base%7D%7B%5Ctextrm%20Hypotenuse%7D)
Or, Cos Ф = ![\dfrac{\textrm OA}{\textrm OB}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctextrm%20OA%7D%7B%5Ctextrm%20OB%7D)
or, Cos Ф = ![\dfrac{\textrm 20}{\textrm 70}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctextrm%2020%7D%7B%5Ctextrm%2070%7D)
Or, Cos Ф = ![\dfrac{\textrm 2}{\textrm 7}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctextrm%202%7D%7B%5Ctextrm%207%7D)
∴ Ф = ![Cos^{-1}(\frac{2}{7})](https://tex.z-dn.net/?f=Cos%5E%7B-1%7D%28%5Cfrac%7B2%7D%7B7%7D%29)
I.e Ф = 73.39°
Now in radian ,
∵ 180° =
radian
∴ 73.39° =
× 73.39°
=
× 73.39° = 1.280 radian
Hence The the angle which the wire make with the ground is 1.280 radian . Answer
Answer:
Ratios describe proportions. We can always multiply across ratios, or divide across them (as long as we do it to all of them). For example, the ratio 3 : 2 is the same as 6 : 4 and 300 : 200. Accuracy Tip.
Step-by-step explanation:
The first answer is C.
The second answer is A.
Answer:
60°
Step-by-step explanation:
180 - 33 - 187 = 60
Answer:
m=6
Step-by-step explanation:
38+8m+4=90
42+8m=90
8m=90-42
8m=48
m=6