Answer: 37
Step-by-step explanation:
I graphed the function and found answer.
Answer:
![cos(tan^{-1}(0))=1](https://tex.z-dn.net/?f=cos%28tan%5E%7B-1%7D%280%29%29%3D1)
Step-by-step explanation:
Evaluate cos(tan^-1 0)
![cos(tan^{-1}(0))](https://tex.z-dn.net/?f=cos%28tan%5E%7B-1%7D%280%29%29)
We know that tan(0)=0
tan (0 degree)=0
![tan^{-1}(0)=0](https://tex.z-dn.net/?f=tan%5E%7B-1%7D%280%29%3D0)
Replace it in our problem
![cos(tan^{-1}(0))](https://tex.z-dn.net/?f=cos%28tan%5E%7B-1%7D%280%29%29)
![cos(0)](https://tex.z-dn.net/?f=cos%280%29)
At 0 degree the cos value is 1
So co(0)=1
![cos(tan^{-1}(0))=1](https://tex.z-dn.net/?f=cos%28tan%5E%7B-1%7D%280%29%29%3D1)
We are given with
walking speed = 5 km/hr
bus speed = 60 km/hr
total distance = 35 km
total time = 5 hr
To solve this, we use the equations
x + y = 5
5x + 60y = 35
The solution is
x = 4.82 hr
y = 0.18 hr<span />