- #1
NoobeAtPhysics
- 75
- 0
Homework Statement
Determine the force in each member of the truss, and state if the members are in tension or compression.
Homework Equations
T=rf
The Attempt at a Solution
I am trying to understand why they used sin for the x component of Joint D and cos for the y component of Joint D. I don't really understand when to use cos and when to use sin.