List of top Calculus Questions asked in GATE MA

f(x,y)=\(\left\{\begin{matrix} 1-cos(\frac{x^2}{y^2}) \\  \sqrt{x^2+y^2} \end{matrix}\right.\) ;if y≠0 & n∈R, then

Number of finite non-isomorphic groups with exactly 3 conjugacy classes_____.