According to the ayllabus available at https://engineering.careers360.com/articles/jee-main-paper-2-syllabus you need to completely practise all the topics like Complex Numbers and Quadratic Equations, Matrices and Determinants, Sets, Relations and Functions, Mathematical Induction, Permutations and Combinations, Mathematical Reasoning, Limit, Continuity and Differentiability, Integral Calculus, 3-D Geometry, Differential equations, Binomial Theorem and its simple applications, Sequences and Series, Vector Algebra, Statistics and Probability, Trigonometry and Co-ordinate Geometry. Focus on Trigonometry, Co-ordinate Geometry, Algebra, Matrices and Determinants. You also need to focus on topics like Heights and Distances, Statistics and Logarithms. Also focus on Quadratic Equations and Binomial Theorem.