Answer: All sides are 5cm hope this helps...
The one you selected is right... i just punched it into the calculator and that's correct.
Answer:
28 kilowatt hours
Step-by-step explanation:
The total distance = 2 × 42 miles = 84 miles
So the kilowatt hours of electricity would it will take = ![\frac{84}{3}= 28\:kilowatt hours](https://tex.z-dn.net/?f=%20%5Cfrac%7B84%7D%7B3%7D%3D%2028%5C%3Akilowatt%20hours%20)
Answer:
![\displaystyle \frac{\cos^2(A)}{1+\sin(A)}=1-\sin(A)](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B%5Ccos%5E2%28A%29%7D%7B1%2B%5Csin%28A%29%7D%3D1-%5Csin%28A%29)
Step-by-step explanation:
We want to simplify:
![\displaystyle \frac{\cos^2(A)}{1+\sin(A)}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B%5Ccos%5E2%28A%29%7D%7B1%2B%5Csin%28A%29%7D)
Recall the Pythagorean Identity:
![\sin^2(A)+\cos^2(A)=1](https://tex.z-dn.net/?f=%5Csin%5E2%28A%29%2B%5Ccos%5E2%28A%29%3D1)
So:
![\cos^2(A)=1-\sin^2(A)](https://tex.z-dn.net/?f=%5Ccos%5E2%28A%29%3D1-%5Csin%5E2%28A%29)
Substitute:
![\displaystyle =\frac{1-\sin^2(A)}{1+\sin(A)}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%3D%5Cfrac%7B1-%5Csin%5E2%28A%29%7D%7B1%2B%5Csin%28A%29%7D)
Factor. We can use the difference of two squares pattern:
![\displaystyle =\frac{\left(1-\sin(A))(1+\sin(A))}{1+\sin(A)}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%3D%5Cfrac%7B%5Cleft%281-%5Csin%28A%29%29%281%2B%5Csin%28A%29%29%7D%7B1%2B%5Csin%28A%29%7D)
Cancel. Hence:
![\displaystyle \frac{\cos^2(A)}{1+\sin(A)}=1-\sin(A)](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B%5Ccos%5E2%28A%29%7D%7B1%2B%5Csin%28A%29%7D%3D1-%5Csin%28A%29)
Answer:
18/3 =6/1 and 12/2=6 so both answers should be 6