1967 - Start Up
John Doe developed the Cosine Selling System® methodology and created the concept of ‘reinforcement training’ to support
1980 - Stage 01
John Doe developed the Cosine Selling System® methodology and created the concept of ‘reinforcement training’ to support
1990 - Stage 02
John Doe developed the Cosine Selling System® methodology and created the concept of ‘reinforcement training’ to support
2010 - Stage 03
John Doe developed the Cosine Selling System® methodology and created the concept of ‘reinforcement training’ to support
2010 - 2018
John Doe developed the Cosine Selling System® methodology and created the concept of ‘reinforcement training’ to support
