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# Archive – 2015-16

## Std-11, Science, Mathematics, Application of Derivatives

2016-03-17T10:46:27+00:00 Categories: Archive - 2015-16||

Good afternoon students, today we will study maxima and minima increasing decreasing

functions and other applications of Derivatives. Let us start.

Derivatives are very widely used and they have many different applications. As we studied in

the last lecture, firstly they are used in finding equation of tangents, equation of normals.

Secondly, they are also used for checking whether […]

## Std-11, Science, Mathematics, Probablity

2016-03-17T10:50:44+00:00 Categories: Archive - 2015-16||

Greetings for the day, today we will study topic Probability. Probability, in which we will talk

about chance of happening of an event, chance of happening of any event. Say, everybody

knows about classical definition of Probability. We had studied in 10th the classical definition

that probability of any event is equal to number of favourable cases divided […]

## Std-11, Science , Mathematics , Permutation and Combination

2016-03-17T10:38:30+00:00 Categories: Archive - 2015-16||

Good afternoon, students, today we will start with next topic, Permutations and

Combinations. In permutations and combinations we will talk about counting. We will know

how to count fast. In this we will study how to count quickly.

For example, in this row 8 students are sitting. One way of counting is 1, 2, 3, 4, 5, 6, […]

## Std-11, Science, Mathematics, Chapter-10, Circles

2016-03-17T09:38:32+00:00 Categories: Archive - 2015-16||

Good morning class, today we will start with new chapter, Circles. Everybody knows what is a circle.

Circle is locus of a point which moves in such a way that its distance from a fixed point remains

constant. So the locus of that point which moves in such a way that from a fixed point the […]

## Std-11, Science, Mathematics, Chapter-9, Straight Line

2016-03-17T09:34:19+00:00 Categories: Archive - 2015-16||

Good morning class, today we will study topic of straight lines. We all know what is a straight line.

Let us talk about the centroid of the triangle. See, centroid is point of intersection of medians of

triangle. The point where two medians meet what do we call that point, centroid. For example, say

this […]

## Std-11, Science, Mathematics, Chapter-15, Limits Continuity and Derivability

2016-03-17T10:23:45+00:00 Categories: Archive - 2015-16||

Good evening class, today we will talk about Limits. Let us talk about few simple formulae of limits,

limit extending to a, x raised to par n minus a raised to par n upon x minus a is equal to n into a2 par

n minus 1. Limit extending to zero, e raised to par […]

## Std-11, Science, Mathematics, Chapter-14, Inverse Trigonometry

2016-03-17T10:19:45+00:00 Categories: Archive - 2015-16||

Good afternoon, students, welcome to the class. Today we will study inverse trigonometric functions

with respect to JEE Mains syllabus. We will solve those kinds of questions which come in JEE Mains.

Let us start with first very simple question. We have to find tan of cos inverse x.

See let cos inverse x is equal to […]

## Std-11, Science, Mathematics, Chapter-13, Matrices and Determinants

2016-03-17T09:45:51+00:00 Categories: Archive - 2015-16||

Good morning students. Today we will talk about topic, Matrices and Determinants. We

know what is Matrix it is a rectangular arrangement of numbers and what is Determinant, it

is a square arrangement of numbers. Determinant is always associated with a value. So we

know many things about Matrices and Determinants, and […]

## Std-11, Science, Mathematics, Chapter-12, Vectors and 3D

2016-03-17T09:42:08+00:00 Categories: Archive - 2015-16||

Good afternoon class, today we will study the topic Vectors and 3D.

Vectors and 3D is a very important topic. Many questions come in JEE Mains, majorly of 3D. You

have to learn this topic very well. In this short lecture people talk about what kinds of questions

come in competition exams and how to solve […]

## Std-11, Science, Mathematics, Chapter-6, Complex Number

2016-03-08T14:26:41+00:00 Categories: Archive - 2015-16||

Good morning students, today, we will study Complex Numbers. Those numbers which are not real,

what do we call those numbers, Complex Numbers. Everybody of you know that the solution to this

type of equation is not real. So, this solution is called complex numbers. There are two solutions of

this equation, one is square root […]

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