Find dy/dx

Matching exercise

    
Match the items on the right to the items on the left.
x = a cos θ, y = a sin θ.
x = at², y = 2a
x = a (θ + sin θ), y = a (1 –cos θ).
x = sin t, y = cos 2t
-cotθ
1/t
tan(θ/2)
-4sint