Thursday, July 22, 2021

Solution to Social Media Post: 22-07-2021 : Geometry

 

Two chords AC and BD of a circle intersect each other at the point O. If two tangents drawn at the points A and B intersect at the point P and two tangents drawn at the points C and D intersect at the point Q, prove that angle P + angle Q = 2 angle BOC 

Tuesday, May 18, 2021

Inverse Laplace Transformation

Indian Statistical Institute B.Math & B.Stat Solved Problems, Vinod Singh ~ Kolkata

 In mathematics, the Laplace transform, named after its inventor Pierre-Simon Laplace is an integral transform that converts a function of a real variable  (often time) to a function of a complex variable  (complex frequency). The transform has many applications in science and engineering because it is a tool for solving differential equations. In particular, it transforms differential equations into algebraic equations and convolution into multiplication.

The Laplace transform of a function f(t), defined for all real numbers t ≥ 0, is the function F(s), which is a unilateral transform defined by

 

 

 

 

(Eq.1)

where s is a complex number frequency parameter

, with real numbers σ and ω.

An alternate notation for the Laplace transform is  instead of F.

Get solution of the following problems.


Evaluate $\mathcal{L} \{ \sin^2 at \}$ $$$$ Evaluate $\mathcal{L} \{ e^{-2t} ( 3\cos 6t - 5 \sin 6t) \}$ $$$$ Evaluate $\mathcal{L} \{ e^{-2t} ( 3\cos 6t - 5 \sin 6t) \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{\alpha}{s-2} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{1}{(s-1)(s-2)} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{3s-2}{s62-4s+20} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{1+s^8}{s^9)} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{s}{s^2+2}+ \frac{6s}{s^2-16}+\frac{3}{s-3} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{1}{(s+2)^2(s-2)} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{1}{s^2-6s+10} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{3s+7}{s^2-2s-3} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{1}{(s+a)^3} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{s}{(s^2-a^2)^2} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{s}{(s^2+a^2)^2} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{s^2}{(s^2+2^2)^2} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{1}{s^2+6s+13} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{1}{(s^2+1)(s^2+4s+5)} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{3s^2+10s+3}{(s^2+1)(s^3+4s62+5s+2)} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{2s+7}{(s+3)^4} \}$ $$$$ Evaluate $\mathcal{L}^{-1} \{ \frac{s+3}{(s^2+4)^2} \}$ $$$$ Download the file below:

Sunday, May 16, 2021

Geometry Solved Problems : Circles

Solved problems on circles for class X. Get solutions of problems shown in the post and many more. Visit the link Solved Problems: Circles

Friday, February 19, 2021

Trigonometry: Solved Problems

Solutions of Triangle is an important topic in the JEE Main and JEE Advanced and in class XI for CBSE and other state boards in India. This topic comprises various formulae and rules like the sine rule, cosine rule, tangent rule etc. Questions based on the application of these formulas are often asked in exams. Revising these problems will help students to remember them and easily solve other questions of similar type and also apply their learning to new problems:

Solved Problems from the Book of S.L Loney Plane Trigonometry: CLICK HERE

More Problems to follow soon :) 

Wednesday, January 20, 2021

WORKSHEET RELATION AND FUNCTIONS: CLASS XI

 In relations and functions Class 11, you will learn the cartesian product of sets along with relations and functions. In our day-to-day life, we have known the term relations in a pattern such as the relation between brothers and sisters, husband and wife or teacher and student. In Maths, the term relation is used to relate the numbers, symbols, variables, sets, group of sets, etc. For example, A is a subset of B denotes the relation of A and B. A function is a kind of relation which is operated between two quantities to yield output.

In this WORKSHEET, we will provide you with the relations and functions class 11 PROBLEMS, so that it would be easier for you to learn and understand the concepts.

If you have any query please comment in the comment box.


Thursday, December 24, 2020

Higher Secondary Board Examination ( HS-2021 ) : West Bengal Board of Higher Secondary Education

 The dates for Higher Secondary Board Examination ( HS-2021 ), West Bengal Council of Higher Secondary Education (WBCHSE) has been published by the council along with the dates of class XI examinations. The dates are given below. Please make sure these are tentative dates and are subjected to change following COVID-19 pandemic situation.





Monday, December 21, 2020

Law of Total Probability : Solved Problems

 Solved problems on theorem of total probability for CBSE, ISC and other state boards in India. 

Problem 1. A bag contains 3 white and 2 red balls and another bag contains 2 white and 4 red balls. A ball is taken from the first bag and without seeing its colour is put in the second bag. A ball is taken from the latter. Find the probability that the ball drawn is red.

Problem 2. The ratio of the number of boys to the number of girls in a class is 1:2. It is known that the probabilities of a girl and a boy getting a first division are 0.25 and 0.28 respectively. Find the probability that a student chosen at random will get first division.

Problem 3. A bag contains 3 white and 6 black balls and another bag contains 6 white and 3 black balls. A bag is selected at random and a ball is drawn. Find the probability that the ball drawn is of white colour.

Problem 4. Two machines A and B produce respectively 60% and 40% of the total number of items of a factory. The percentage of defective output of these machines are respectively 2% and 5%. If an item is selected at random, what is the probability that the item is defective?

Problem 5. There are two bags. The first bag contains 5 red and 3 black balls and the second bag contains 3 red and 5 black balls. Two balls are drawn at random from the first bag and are put into the second bag without noting their colours. Then two balls are drawn from the second bag. Find the probability that the balls drawn are one red and one black.

Problem 6. There are two bags. The first bag contains 5 red and 3 black balls and the second bag contains 3 red and 5 black balls. Two balls are drawn at random from the first bag and are put into the second bag without noting their colours. Then two balls are drawn from the second bag. Find the probability that the balls drawn are one red and one black.

Problem 7. A bag X contains 3 white and 2 black balls and another bag Y contains 2 white and 4 black balls. A bag and a ball out of it is picked at random. What is the probability that the ball is white?

Problem 8. An urn contains m white and n black balls. A ball is drawn at random and is put back into the urn along with k additional balls of the same colour as that of the ball drawn. A ball is again drawn at random. What is the probability that the ball drawn now is white?

Problem 9. An urn contains m white and n black balls. A ball is drawn at random and is put back into the urn along with k additional balls of the same colour as that of the ball drawn. A ball is again drawn at random. What is the probability that the ball drawn now is white?

Problem 10. A person has undertaken a construction job. The probabilities are 0.65 that there will be strike, 0.80 that the construction job will be completed on time if there is no strike, and 0.32 that the construction job will be completed in time if there is a strike. Determine the probability that the construction job will be completed in time.

Problem 11. A survey is carried out to find the percentage of men who sing in the bathroom. Because some people may be too embarrassed to admit openly to be bathroom singers, each person question is asked to roll a die in secret and answer NO if the number shown is 1 and YES if it is 6, no matter what the true answer is, but to tell the truth (YES or NO) if 2,3,4 or 5 comes out. Because the number shown is not revealed, it is impossible to tell from the answer given whether the person is a bathroom singer or not. Suppose that the probability of answering YES in this survey is found to be 2/3. What is the probability of being a bathroom singer, then?

 SOLUTION:



Friday, December 11, 2020

HS XII Mathematics PROJECT 2024-25

Preparation of Project Work- Mathematics

Each student has to select one topic from Group-A and  topic no. 6 from Group-B. Two separate files must be made. (one for each group)

Date of submission: On first day after Puja Vacation 

Project can be written in Bengali or English. 

The cover page must clearly contain the following information:

NAME OF SCHOOL

STUDENT'S NAME, 

CLASS, SECTION & ROLL NUMBER

SUBJECT

TOPIC 

GROUP A or B

REGISTRATION NUMBER

The same information must also be registered on the first page of your copy.

Topic Group-A ( Choose any one of the following)


                 Topic Group-B ( Only Topic 6 from this group)




IMPORTANT INSTRUCTIONS:


        I. Don't print and paste images, tables or graphs from the internet. If any graph or sketch is needed, you must prepare it on your own using graph paper & pencil.

        II. Give proper examples and diagrams as needed.

        III. USE SEPARATE COPIES FOR DIFFERENT GROUP.

        IV. USE COPIES PROVIDED BY THE SCHOOL. 

        V.  Write on one side of the paper.

Project Writing: 

Use the following structure to complete your project:

Cover Page: All details as described earlier.
First Page: Same details as on cover page.
Second Page: Write the topic in detail as it is.

Then divide your work in the following sections:
            1. INTRODUCTION
            2. DESCRIPTION
            3. CONCLUSION
            4. BIBLIOGRAPHY

Marks Distribution: (20 Marks)

        Presentation: 4 (Group-A) + 4 (Group-B)
        Note Book: 4 (Group-A) + 4 (Group-B)
        Viva-Voce: 4 
        

Tuesday, November 17, 2020

Assessment and Solved Problems: SET THEORY -XI Science

Please go through the slides one by one and solve the questions that would appear on the slides.

Solved Problems: Set Theory - 11 Science



Assessment on set theory. Answer all questions. Each question carries 1 mark and has only one correct option. Please enter a valid e-mail address. If you have any query, leave your comment in the comment box. 

Class Test: 

Total time: 40 mins  ( 6 pm - 6:40 pm )                                            Full Marks: 15

Thanks for participating, those who have not given the test should clarify for the same:

Scores:

11/18/2020 18:13:53saya****@gmail.com7 / 15Sayan Saha 04
11/18/2020 18:20:28deb***ari23@gmail.com6 / 15Debjit Kushari roll:- 07
11/18/2020 18:20:47sa**as6767@gmail.com9 / 15Saima das 14 A
11/18/2020 18:21:09di***g147@gmail.com5 / 15Disha Ghosh 16
11/18/2020 18:25:25dha***nk@gmail.com8 / 15Subhadeep Dhar - 05
11/18/2020 18:26:54ta****nog@gmail.com5 / 15Tamaghno Ghosh roll–3
11/18/2020 18:35:01ag****dhar@gmail.com10 / 15Ritam Dhar.ROLL NO A-2.
11/18/2020 18:36:07mistr***885@gmail.com5 / 15Jayanti Mistri 15A
11/18/2020 18:39:12shre*****47@gmail.com5 / 15Shreya majumdar.18
11/18/2020 18:39:39kau****74@gmail.com10 / 15Kaushik kundu...Roll no.-6A
11/18/2020 18:40:22tap***572@gmail.com9 / 15Meghasree Mandal -11
11/18/2020 18:41:43tap***etro@gmail.com4 / 15Tanmesh Mondal/A-17

Delayed Submission due to some technical issue:

11/18/2020 19:04:33jai***s106@gmail.com11 / 15Jaita Das

Test conducted on the request of the student:
11/19/2020 18:36:35dh****jna@gmail.com13 / 15Mourya Vedajna, 20

You can't lie to your soul.

Friday, September 18, 2020

Partial Differentiation: SOLVED PROBLEMS FOR College Level Students ( Engineering and Maths Major )

Solved Problem from the topic of Partial Differentiation for Mathematics Major Students and college level and engineering students. 






SET-1 Partial Differentiation ( Direct Problems ) PDF File
SET-II Chain Rule 
To be available soon.
SET-III Euler's Theorem 

Sunday, September 13, 2020

TRIGONOMETRY : TRIGONOMETRICAL RATIOS SOLVED PROBLEMS FOR 10TH GRADE CBSE ICSE OTHER STATE BOARDS

 

TRIGONOMETRY : TRIGONOMETRICAL RATIOS SOLVED PROBLEMS FOR 10TH GRADE ( CBSE, ICSE AND OTHER STATE BOARDS). SUBSCRIBE FOR MORE SOLVED PROBLEMS WHICH WILL BE UPLOADED SOON.

Trigonometric ratios are the ratios between edges of a right triangle. These ratios are given by the following trigonometric functions of the known angle A, where ab and c refer to the lengths of the sides in the accompanying figure:

  • Sine function (sin), defined as the ratio of the side opposite the angle to the hypotenuse.
  • Cosine function (cos), defined as the ratio of the adjacent leg (the side of the triangle joining the angle to the right angle) to the hypotenuse.
  • Tangent function (tan), defined as the ratio of the opposite leg to the adjacent leg.
If you have any query feel free to connect us at any of the following platforms. Free help for your queries. Helping Students! Feel free to send your problems. Follow us on the most popular platforms. Whatsapp: +91-9038126497

Thursday, September 10, 2020

SOLVED ISC MATHEMATICS BOARD SPECIMEN PAPER 2021

Get the solved ISC Mathematics Board Specimen Paper 2021 as provided by the official website of the board COUNCIL FOR THE INDIAN SCHOOL CERTIFICATE EXAMINATIONS

This is not a guess paper, every year the board provides a specimen paper for the students to help gain an insight of the structure they will be facing during their board examination. Students can expect a similar pattern while the degree of difficulty may vary. 

Don't forget to comment if you have any question. Get the mock test paper for ISC 2021 Mathematics by mailing us. 

For any query or help Whatsapp

E-mail: prime.maths@hotmail.com 

ISC Mathematics Board Specimen Paper 2021

ISC Mathematics Board Specimen Paper 2021 - Solution 

ISC Mock Test Paper 2021 ( Free Copy -On request )



Thursday, September 3, 2020

CBSE MATHS PAPER SOLVED 2020

The Central Board of Secondary Education (CBSE) conducted the class 12 annual board exam of mathematics on 17th of March 2020. Here is the solved CBSE MATHS PAPER  2020.

The question paper of class 12 Mathematics is divided into four sections- A, B, C and D. All questions are compulsory. 

Section A carries 20 questions of 1 mark each.

Section B carries 6 questions of  2 mark each.

Section C carries 6 questions of 4 mark each.

Section D carries 4 questions of 6 mark each.

Click here to download CBSE class 12 Mathematics Question Paper


Click here to download CBSE class 12 Mathematics Question Paper Solution.

google.com, pub-6701104685381436, DIRECT, f08c47fec0942fa0