PGT in Mathematics, GHSS Vazhudhavur, Villupuram Dist, Tamilnadu, India, He has been teaching Math for 15 years. Doing Ph.D. in Bharathiar University, on a problem of Stability analysis in Non – Newtonian fluids.

Sir have a doubt in first revision question paper Q no. 38. Let the functionf.R R be defined by f(x)= cos x for every xΣR show that f is neither one to one nor onto

Sir have a doubt in first revision question paper Q no. 38. Let the functionf.R R be defined by f(x)= cos x for every xΣR show that f is neither one to one nor onto