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# 11 TH MATHS

## Class 11 Math Essentials

Welcome to Math Classes by Suman Mathews! We provide online math tutoring services for students in class 11 and 12. Our goal is to make sure each student understands the material and is able to apply it to their own studies.

Our tutoring sessions are designed to be comprehensive and easy to follow. We provide step-by-step instructions on how to solve math problems, as well as helpful videos and formulas. We also offer specialized tutoring for the ISC and NCERT syllabus. With our tutoring, you can feel confident and prepared for your math exams.

## Angle between 2 lines in Coordinate Geometry

https://youtu.be/JPvzGJyAqeM

The concept of angle between 2 lines is explained here. Note that , when we put the modulus sign, you get the acute angle. If you remove the modulus sign, you get the obtuse angle .

There is no substitute for hard work. Practice each video with me!

## Locus Problems in Coordinate Geometry

https://youtu.be/ruQJKgjQivs

You are introduced to locus and how to apply it in problems. Basically you need to remember that the locus is a point which moves and satisfies a given condition. The concept of bisector of the acute angle and obtuse angle between 2 lines is also discussed. An important topic!

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# You will be introduced to parabola which is one of the topics in Conic Sections, again , a slightly advanced topic.

## Parabola: A basic understanding

https://youtu.be/1mCTLCFY9kU

What is a parabola and how is it derived from Conic sections? You are taught how to calculate equation of a parabola given its focus and directrix. Tips on how to calculate the axis is also discussed.

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## Types of parabola

https://youtu.be/5RnlvMzYVUg

You are introduced to the 4 basic types of parabolas and how to calculate the focus, vertex, axis, directrix equation, length of the lotus rectum in each case. An interesting point to note is that for a parabola, its eccentricity is one.

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## Condition of tangency for a parabola

https://youtu.be/E3bxNFAHS5U

How to calculate the equation of a tangent to a parabola? Learn the different methods and the approach to be taken for each type by watching this video.

These are not just videos, they are solutions to your problems.

# Moving on to Statistics, the topics covered here include Mean Deviation, Standard deviation, Mean , Median, Mode. Quartiles, Deciles and Percentiles,Correlation , Rank Correlation and much more!

## Quartiles, Deciles and Percentiles

https://youtu.be/DlzwQ-gXCNo

You will learn how to calculate quartiles, deciles and percentiles for a discrete and continuous frequency distribution. A popular video useful for College maths as well.

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## Calculating Mean Deviation

https://youtu.be/EJxD9YTHcFk

You are taught how to calculate mean deviation for a discrete and grouped frequency distribution. Though, mean deviation is not widely used, it is a useful tool to know how data is distributed around the mean.

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## How to calculate the combined mean, standard deviation and mode

3 important concepts are discussed here, namely how to calculate the combined mean and standard deviation and how to evaluate the mode for a discrete and grouped frequency distribution. The problems on combined mean and mode are used for the GRE and GMAT quant section as well.

Tons of math videos for you to learn from!

You cannot learn math just by watching videos. You need to practice every step with me slowly until you understand.

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## Standard Deviation

https://youtu.be/yXb4VzPgV9g

How to calculate standard deviation, for a discrete set of values and a frequency distribution, both grouped and ungrouped is discussed here. A useful video.

A more meaningful life in math starts now!

## Correlation coefficient

https://youtu.be/Mwhpt2ZO90E

What is correlation coefficient ? Learn different ways of computing the correlation coefficient . A very important tool for students learning Statistics. You cannot learn just by watching videos.. Learning becomes fruitful when you take a pen and paper and practice along with me!

## Rank Correlation coefficent

https://youtu.be/e0JLKVc36h0

What is rank correlation? Learn more about this and Spearman's rank correlation for distinct ranks and repeated ranks by watching this video!

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