Question
find equations for the tangent and the normal at P (1n2, 2k) on the curve with equation y=ke^x, where k is a constant.
(b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/dx=0
(b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/dx=0