Given that x is decreasing at a constant rate of 2 radians per
second.
Find the rate of change in the area of a when x=q. Is the
area increasing or decreasing at the moment. Explain your answer
briefly.
The picture shown that a tetrahedron PQRS where PQ is perpendicular
to the plane QRS. PQ = QR = QS = RS = 1m, PT = TV = VR and
PU = UW = WS.