How to Find Angles in Equilibrium Equations?

[ozgurakkas]

I am studying statics and more precisely multi force members. I understand the process about solving how to find reactions and forces in x and y directions. However, I have a great tendency to confuse it when if comes to figuring out angles to write equilibrium equations.

Any help for me to clear out how to find angles on the attached figure?
Thank you.

Homework Statement

Homework Equations

The Attempt at a Solution

 

[radou]

A good idea would be to start out with trigonometric identities for right triangles. :)

 

[ozgurakkas]

sinx=opposite/hyppotenusse
cosx=adjacent/hypotenuse
tanx=opposite/adjacent

that's all I need to find the angles. I am not sure why you have taken it too far.However, I appreciate your answer.


Thank you