Railway Recruitment Board exams requires a strong foundation in Mathematics. Both RRB Group D and RRB NTPC exams test candidates on topics like Arithmetic, Algebra, Mensuration, and Trigonometry.

There are some trigonometric identities which you must remember in order to simplify trigonometric expressions when required. When you are asked to prove something, ignore the right hand side of the ...

Abstract: Trigonometry is one of the topics in mathematics that the students in both high school and pre-undergraduate levels need to learn. Generally, the topic covers trigonometric functions, ...