Answer:
180< x < 270 so x is in 3rd quadrant ,hence tan x is positive cos x=-4/5 tan(x/2) = √ {(1 − cos x) / (1 + cos x)) = √ { (1+4/5)/(1–4/5) } =√{ 9/5)/(1/5) } =√9=±3 now ...
Step-by-step explanation:
Pressure p = force F/ area A
P = F/A
F = 100N and A = 4m^2
P = 100/4
P = 25N/m^2
I don't know what you need
