# Thread: Calculating the angles of the following triangle

1. ## Calculating the angles of the following triangle

Hello, im stuck on finding the angles in the following triangle in order to find the resultant forces.

I have this traingle; http://img293.imageshack.us/img293/8215/questione.png

which i want to find out all the angles for. I know that the following is;
Rx = 153.2
Ry = 128.56
Here is the angles my teacher found... somehow;
http://img812.imageshack.us/img812/2723/solutions.png

ive tried using the cosine rule, in combination with the resultant x and y forces, but it didnt work

any tips?
Thanks allot

2. Originally Posted by stevemilw
Hello, im stuck on finding the angles in the following triangle in order to find the resultant forces.

I have this traingle;

which i want to find out all the angles for. I know that the following is;
Rx = 153.2
Ry = 128.56
Here is the angles my teacher found... somehow;

ive tried using the cosine rule, in combination with the resultant x and y forces, but it didnt work

any tips?
Thanks allot
...

3. thanks, the angles are in the diagram to the right