Parametric Equations Parameter 31: 4 x = 4 cos(6), y = 7 sin(9) 9 = (a) Use a graphing utility to graph the curve represented by the parametric equations. 6 (b) Use a graphing utility to find dx/dt, dy/dt, and dy/dx at the given value of the parameter. dx = -4 sin t X dt dy dt dy dx (c) Find an equation of the tangent line to the curve at the given value of the parameter. y = (d) Use a graphing utility to graph the curve and the tangent line from part (c). y 8- y 2 -2 0 2 -2 -A -6- C C(d) Use a graphing utility to graph the curve and the tangent line from part (c)