This is just for a liquid at rest :

See the diagram please..

Aa/Ac = sin@

=>Aa = Acsin@

Ab/ac =cos@

=>Ab =Accos@

Resolve Fc

As fluid is at rest,

Fc sin @ =Fa

Fc cos @ =Fb

Fa/Aa=Fb/Ab

Thus, pressure at every point is the same..

Dunno about accelerating fluids...if pressure is the same, why will they flow??

Someone clarify please!