Graphing y = -2 cos(2x) - YouTube
Graphing Sine and Cosine with Phase (Horizontal) Shifts, Example 2 - Duration: 6:21. by patrickJMT 118,249 views 6:21 Play next Play now The Graph of Cosine, y = cos (x) - Duration: 9:58. by patrickJMT 39,654 views 9:58 Play next Play now ......