Homework Statement
The instruments attached to a weather balloon in the figure below have a mass(m) of 4.8 kg. The balloon is released and exerts an upward force(F) of 109 N on the instruments. What is the acceleration of the balloon and instruments?
Homework Equations
F = ma
The...
Homework Statement
Solve for x using half-angle identities
cos (x/2) = -√2 / 2
Homework Equations
cos(x/2) = ± √(1+cosx)/2
The Attempt at a Solution
I am trying to figure out what to do with the identity, but I have no idea how to start. I know that x = 270 degrees or 3pi/2, but I do not...