A curve C C\,C has parametric equations
x=2cost−1,y=4sin2t+30≤t≤2π x = 2 \cos t - 1, \quad y = 4 \sin^2 t + 3 \quad 0 \leq t \leq 2\pi x=2cost−1,y=4sin2t+30≤t≤2πFind an equation for C C\,C in the form y=f(x)y = f(x)y=f(x) and state the domain for which the curve is defined.
Sketch the curve