Descartes' Rule of Signs explained by an IITian 23 Feb 2017 This explanation of Descartes' Rule of Signs was submitted by Ayush, a HashLearn tutor from IIT, Dhanbad. Consider a polynomial equation p(x)=0 (descending powers of x) i) Number of positive roots of the equation p(x)=0 cannot…

Study Tips: Integral of sec(x).cosec(x) 21 Feb 2017 This tip on integration was contributed by one of our top tutors, Shashwat. Following up on our tips on calculus, this week we will explain the trick to finding the integral of the aforementioned function. Want more tips like this?…

A Guide to Studying Chemistry 17 Feb 2017 Chemistry can be an intimidating subject. The entire syllabus is roughly divided into three parts - organic chemistry, inorganic chemistry, and physical chemistry. Studying each section seems to be a daunting task as it never seems to end. However, chemistry…

Study Tips: Differentiation of an Infinite Series 16 Feb 2017 This tip on calculus was contributed by one of our top tutors, Shashwat. What you will learn from this tip: The trick to differentiate an infinite series. Want more tips like this? Request a session on HashLearn now (it's free!…

Study Tips: Finding the Roots of Unity 14 Feb 2017 This tip on roots of an equation, and complex numbers was contributed by one of our top tutors, Sudheer Naidu. What you will learn from this tip: An understanding of the relation between complex numbers and the roots of unity.…

How to Prepare for Board Exams and Entrance Tests at the Same Time 13 Feb 2017 Entrance exams and board exams always happen one after the other, with barely any gap between the two. As a matter of fact, this year, there is only a week long gap between the CBSE board exams and the JEE…