MATHEMATICS · Single correct · AP · Calculus BC · Parametric, Polar, and Vector-Valued Functions · Parametric, Polar, and Vector-Valued Functions
Problem
Consider the curve x=sint,y=sin2t for 0<t<2π. How many values of t in this interval give a horizontal tangent and how many give a vertical tangent, respectively?
(a) 4 horizontal, 4 vertical
(b) 4 horizontal, 2 vertical
(c) 2 horizontal, 4 vertical
(d) 2 horizontal, 2 vertical