# Calculating the angles of the following triangle

• Aug 9th 2010, 03:19 PM
stevemilw
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
• Aug 9th 2010, 03:34 PM
skeeter
Quote:

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; 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

...
• Aug 9th 2010, 03:55 PM
stevemilw
thanks, the angles are in the diagram to the right