Question

parametric equation
x=sin2x-x, y=cos2x+2sinx
show that dy/dx=2cosx/1+2sinx

Answer 1

i only can do till (2cosx-2sin2x)/(2cos2x-1)

Answer 2

its more likely to be x = sin 2t - t and y = cos 2t + sin 2t

Answer 3

- there must be a third variable

Answer 4

t will do as good as anything

Answer 5

find dx/dt and dy/ty

then dy/dx = dy/dt / dx/dt