It varies depending on specialty. Without question, differential/integral/multivariable calculus and ordinary differential equations, with some level of comfort using complex numbers. Extremely likely linear algebra. Possibly advanced linear algebra, partial differential equations, numerical methods, or complex analysis.
You're probably good at SOME math -- basic arithmetic, for instance. The key to learning is to go back to the simplest thing you can't do. A review of your first algebra textbook could be useful. Be patient, be willing to learn everything perfectly. Then trig. You will understand new things just as fast as other people do, when you've a firm foundation.
P.S. If, as a consequence of "modern" teaching methods, you don't know the times tables very well, learn them first.
You will be required to study differential calculus, integral calculus, differential equations, and possibly advanced calculus. These courses are typically required because some of the concepts of electronics requiring solving equations using these skills.
Electrical Engineering takes the highest math among all other engineering disciplines.
math is never plural.
I have taken up EE after higher secondary but I'm not very good at maths. Is EE too difficult to learn without very good mathematical knowledge?
