Eliminate the parameter from each pair of equations. Draw the graph of the resulting equation and tell what part of the graph is covered by the parametric equations. y = 2 sin0 20. x = sec0; y = tan0 19. x = 3 cos20; 21. x = 1 + 3 cos0; 22. x = 2 cos 0; 24. x = t; y = 1 + 3 sin0 y = sin0 y = 6t- 23. x = 4 sin 0; y = 2 cos0