## Mimi_x3 4 years ago Cindy is some distance NW from a building Don is some distance due North the same building. If Don is twice as far as Cindy from the building and they are 40m apart, calculate their distances to the building to the nearest one-tenth of metre.

1. Ekscentrix

You need to use c^2 = a^2 + b^2 in this one, and include sin and cos. You know one is north, and the other is northwest. |dw:1315722352020:dw|

2. Mimi_x3

Oh the pythagoras theorem ? But then I don't know the other 2 sides whats the point of it then ?

3. Ekscentrix

a*arcsin(45) = 40m

4. Ekscentrix

whoops..

5. lakshmandornala

@ekscentri:- I don't think it is a rectangular triangle.

6. Mimi_x3

arcsin ? what's that ?

7. Ekscentrix

a*sin(45)=40m

8. Ekscentrix

try cindy as 56.6m and Don as 113.1m

9. lakshmandornala

sorry right angled triangle

10. Mimi_x3

Oh I get it tyvm (:

11. Ekscentrix

12. Mimi_x3

Idk, it seems right, I will get the solution to it next week, then I will tell you if its right .

13. Ekscentrix

lol, okay. I'm assuming that's how it is, but I could be very wrong.....let's look at it for one more minute.

14. Ekscentrix

|dw:1315722861254:dw|

15. Mimi_x3

Yeah, it seems right that the angle is 45 degrees, so I think that its right, not sure though. Thank you for helping anyways (:

16. Ekscentrix

no prob. Good luck.