Hello Chaitanya Sanjay Joshi,

See if you are a B.tech student then you just need to revise your notes that you have studied in your first year of engineering and some basic mathematics that you have already studied in your high school and intermediate course.

 Engineering Mathematics For Gate 2017-For all stream

This the Gate syllabus for mathematics:-

•  Linear Algebra
•  Calculus
•  Differential Equation
•  Probability and Statistics
•  Numerical Method
•  Complex Variable
•  Transform Theory
• You need to cover all concept step by step and then solve each and every problem from the practice set and exercise to boost your confidence and enhance speed.